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: How many Kilometres in total does the Hemus motorway measure? Passage 1:While attending the University of Iowa, Whitaker played tight end for the University of Iowa Hawkeyes football team, under coach Hayden Fry, appearing in the starting lineup for Iowa's Rose Bowl game in 1991. In 2002, Whitaker was the candidate of the Republican Party for Treasurer of Iowa. From 2004 to 2009, he served as the United States Attorney for the Southern District of Iowa, where he was known for aggressively prosecuting drug traffickers. Whitaker ran in the 2014 Iowa Republican primary for the United States Senate. He later wrote opinion pieces and appeared on talk-radio shows and cable news as the executive director of the Foundation for Accountability and Civic Trust (FACT), a conservative advocacy group.
 Passage 2:From Botevgrad to Sofia, E79 joins Hemus motorway, designated A2. At the Bulgarian capital Sofia you have to enter the Ring Road, until Sofia Northern Bypass motorway is built. Signage is available. From Sofia to south there are of motorways (A6 Lyulin motorway and A3 Struma motorway) to Dupnitsa-north interchange. The Bulgarian Traffic law allows speeds up to on motorways unless otherwise stated. The road is leading from Dolna Dikanya to south, right to the Kulata-Promachonas. All the way to the Border Check point the road is of the standard 2-lane tarmac except for the section from the Pernik Province-Blagoevgrad Province border and the southern entrance to the city of Blagoevgrad where the road is of highway type and is long. The section between Dupnitsa and Blagoevgrad, 37 km long, has been upgraded to a motorway standard and opened to traffic 2015. Also the last of these sections - lot 4 from Sandanski-south to the Greek border of 13 km opened to traffic in August 2015. The stretch between Blagoevgrad and Sandanski - lot 3 - passes through the Kresna Gorge and is planned to feature a tunnel, which will be the longest motorway tunnel in Eastern Europe, whose construction will begin in 2015 and will cost app. EUR 650 mln.
 Passage 3:He was both a Catholic and a royalist, and enjoyed the confidence of Queen Henrietta Maria, who recommended him to Charles I as "a man deserving of every encouragement." In 1645 he tried to get the Confederation of Kilkenny to support King Charles I in the English Civil War on the grounds that their demands for full civic rights to be restored to Roman Catholics would be met. He fought with the Confederates against the Parliamentarians in 1645–6, and led a successful assault on Roscommon Castle in 1646. In 1649 he was imprisoned in London but soon released. After some time in France he was allowed to return to England through the pleas of his brother-in-law John Holles, 2nd Earl of Clare. He is said to have been one of the few Irishmen whom Oliver Cromwell admired, and was also on good terms with Oliver's son Henry Cromwell, although Henry refused his request to be allowed to recover possession of his principal residence, Merrion Castle. During the Commonwealth he seems to have played a careful double game- his second marriage into the Holles family put him in the Parliamentarian camp, but he was also suspected of working for the Restoration of Charles II.
2