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.
Q: Question: How deep is the smaller lake that is part of the Malawi system? Passage 1:German Type IXD2 submarines were considerably larger than the original Type IXs. U-861 had a displacement of when at the surface and while submerged. The U-boat had a total length of , a pressure hull length of , a beam of , a height of , and a draught of . The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines plus two MWM RS34.5S six-cylinder four-stroke diesel engines for cruising, producing a total of for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of for use while submerged. She had two shafts and two propellers. The boat was capable of operating at depths of up to .
 Passage 2:Born in Cleckheaton, West Yorkshire, Strodder came through the youth system of Yorkshire Amateur. He joined Lincoln City in 1982, spending five years at the club and being voted the club's player of the year in 1986, before signing for West Ham United. After three years at West Ham, he moved on to West Bromwich Albion, who he helped to promotion via the playoff final at Wembley Stadium in a team managed by Argentinian and Tottenham Hotspur legend Ossie Ardiles. In 1996 he signed for Notts County, where he was selected for the Third Division PFA Team of the Year in 1997–98. In 1998–99 he had a spell on loan at Rotherham United, before joining Hartlepool United. In 2001 he dropped into non-League football with Guiseley. After retiring from playing he worked for the community development section at Leeds United, before going into business in Menorca.
 Passage 3:Lake Malawi is noted for being the site of evolutionary radiations among several groups of animals, most notably cichlid fish. There are at least 700 cichlid species in Lake Malawi, with some estimating that the actual figure is as high as 1,000 species. The actual number is labelled with some uncertainty because of the many undescribed species and the extreme variation among some species, making the task of delimiting them very complex. Except for four species (Astatotilapia calliptera, Coptodon rendalli, Oreochromis shiranus and Serranochromis robustus), all cichlids in the lake are endemic to the Malawi system, which also includes nearby smaller Lake Malombe and the upper Shire River. Many of these have become popular among aquarium owners due to their bright colors. Recreating a Lake Malawi biotope to host cichlids became quite popular in the aquarium hobby. Most Malawi cichlids are found in relatively shallow coastal waters, but Diplotaxodon has been recorded down to depths of and several (especially Diplotaxodon, Rhamphochromis and Copadichromis quadrimaculatus) are known from pelagic waters.

A:
3