In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.

Q: Question: How many members did No. 11 Group have during the years of the Blitz? Passage: the Second World War, the station was very active during the Battle of Britain and the Blitz in 1940–41 in No. 12 Group (controlled from RAF Watnall in Nottingham) as it was the main fighter station for a lot of the southern East Midlands, and fighters from the station would often patrol as far as Birmingham. During the Battle of Britain many squadrons were rotated through Wittering to spells in the south of England with No. 11 Group that was bearing the brunt of the battle. With many of the Luftwaffe raids during the Blitz taking part at night, Wittering-based squadrons were instrumental in the development of night combat techniques. These included the use of the Turbinlite aircraft which replaced the nose with a powerful searchlight insulated in the nose of Havocs and Bostons. In April 1943 No. 141 Squadron were moved in, operating de Havilland Mosquitoes. 1943 also saw the station host 2 USAAF squadrons, albeit temporarily: 63 Fighter Squadron USAAF with its P47s operated from Wittering between January and March before moving to RAF Horsham St Faith; 55 Fighter Squadron operated its P38s and P51s from Wittering between August and March 1944 before moving to nearby RAF Kingscliffe.
 Links: a. No. 11 Group RAF b. Birmingham c. Birmingham d. 63rd Fighter Squadron

A: a
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Q: Question: How big was the Royal Air Force the year York joined Aston Villa? Passage:York started his career with Handsworth Royal, Birchfield Rangers and the Royal Air Force, and also guested for Chelsea during World War I. In March 1915 he joined Aston Villa as an amateur, signing professional forms in August 1919. He scored one goal in 17 games in 1919–20, but did not feature in the 1920 FA Cup Final, which ended in a 1–0 victory over Huddersfield Town at Stamford Bridge. He appeared just 11 times in 1920–21, before going on to make 47 appearances in the 1921–22 campaign, as the "Villans" finished fifth in the First Division. He scored nine goals in 37 games in 1922–23 and five goals in 43 games in 1923–24. He also appeared at Wembley in the 1924 FA Cup Final, in a 2–0 defeat to Newcastle United. He scored seven goals in 34 matches in 1924–25, before hitting 20 goals in 44 appearances in 1925–26. He bagged 13 goals in 43 games in 1926–27, before being limited to just four goals in 30 appearances in 1927–28. He rediscovered his scoring form with 18 strikes in 48 matches in 1928–29, before hitting seven goals in 32 games in 1929–30. However he played just four times in the 1930–31 campaign, as Villa finished second in the league with an English record of 128 top-flight league goals scored.
 Links: a. 1923–24 Football League b. Royal Air Force c. Huddersfield Town A.F.C. d. Royal Air Force

A: b
****
Q: Question: Which of the armored vehicles used during the Battle of Chongju was the heaviest? Passage:The Battle of Chongju (29–30 October 1950) took place during the United Nations Command (UN) offensive towards the Yalu River, which followed the North Korean invasion of South Korea at the start of the Korean War. The battle was fought between Australian forces from 3rd Battalion, Royal Australian Regiment (3 RAR) and the 17th Tank Brigade of the Korean People's Army (KPA) for control of Chongju, North Korea and the surrounding area. After detecting a strong KPA armoured force equipped with T-34 tanks and SU-76 self-propelled guns on a thickly wooded ridgeline astride the line of advance, the Australians launched a series of company attacks with American M4 Sherman tanks and aircraft in support. Despite heavy resistance the KPA were forced to withdraw and the Australians captured their objectives after three hours of fighting.
 Links: a. Chongju b. T-34 c. M4 Sherman d. North Korea

A:
b
****