In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.

Question: When was the dam that was part of the Missouri River Basin Project completed? Passage 1:The beer brand Budweiser has long been a Super Bowl fixture. Its parent company Anheuser-Busch held a long-term contract with the NFL that allowed it to buy several slots of air time from the game's broadcaster each year at a steep discount, a contract that ran through Super Bowl 50; the company continues to buy multiple commercials in each game. Budweiser runs several advertising campaigns throughout each game, one of which has traditionally featured its mascots, the Budweiser Clydesdales. The Clydesdales were included in at least one Super Bowl commercial every year from Super Bowl IX in 1975 through Super Bowl LI in 2017. Budweiser's parent company Anheuser-Busch has been the most successful advertiser in the annual Super Bowl Ad Meter survey organized by USA Today, having finished first on the survey fourteen times. When USA Today held an "All-Time Ad Meter" bracket tournament in 2014, two Budweiser commercials met in the finals; the winner was a 2008 ad spoofing Rocky, which went against its 1999 ad "Separated at Birth", which featured a pair of Dalmatian puppies given to two separate owners, but eventually seeing each other again after one became a mascot dog on the Clydesdales' carriage.
 Passage 2:WHME signed on the air on September 10, 1977; the station ran mostly religious programs, along with a blend of classic cartoons (such as Tom and Jerry, Bugs Bunny, The Rocky and Bullwinkle Show, The Little Rascals and The Flintstones), sitcoms from the 1950s, '60s and '70s (such as The Dick Van Dyke Show, The Brady Bunch, My Three Sons, Gomer Pyle, U.S.M.C., The Partridge Family and Leave It To Beaver), and some drama series (such as The Lone Ranger). By 1978, the station ran cartoons from 7 to 9 a.m. on weekdays. WHME ran Christian programs such as The PTL Club, The 700 Club, and locally produced Christian programs from 9 a.m. to about 1 p.m. Secular general entertainment programs ran from 1 to 7 p.m. Then after 7 p.m., WHME ran repeats of The PTL Club, The 700 Club and some of the religious shows that aired on Sundays, along with locally produced Christian programs. Saturdays consisted of Christian-themed children's programs until 9 a.m., a blend of secular cartoons and sitcoms until noon or 1 p.m., and some other family-friendly programs until 5 p.m. Christian programming continued after 6 p.m. Saturday nights and all day on Sundays (featuring televangelists such as Jerry Falwell, Jimmy Swaggart and Oral Roberts, as well as the Catholic Mass from Notre Dame). The station began broadcasting on a 24-hour schedule by 1980.
 Passage 3:By the 1920s, SCGX was doubling annually and had emerged as the "fastest growing grain market in the world"; transacting 22 million bushels in 1928 (valued at $336 million in 2018), resulting from its location in the heart of the Corn Belt and self-imposed standards before the Grain Standards Act of 1916 including species admittance and non-mixing. However, its growth was limited by shipping rates. With the trucking industry and Interstate Highway System not yet developed, SCGX was constrained by monopolized railroad rates, primarily by the Great Northern Railway. Exhausting their bargaining power with the Interstate Commerce Commission, SCGX President Charles C. Flanley directed future lobbying efforts to unlocking barge navigation of the Missouri River. His initiative was stalled throughout the 1930s by the Great Depression and Dust Bowl. In 1938, a renewed thirteen year campaign led by Secretary William Henry Marriott finally opened commercial navigation of the Missouri River and helped establish the Missouri River Basin Project, which included development of the Gavins Point Dam. The alternate transportation succeeded in breaking the railroad's monopoly. By the 1970s, SCGX was among the largest exchanges in the world; transacting over 100 million bushels annually (valued at $1 billion as of 2018).
3