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.

Ex Input:
Question: How many soldiers died in the battle that Stanley missed due to illness? Passage:He fought at several battles in Missouri, including the Battle of Wilson's Creek, where he guarded the supply trains. President Abraham Lincoln appointed Stanley as brigadier general September 28, 1861, although the U.S. Senate did not confirm the appointment until March 7, 1862. Fighting in the Western Theater, he participated in the operations against New Madrid, Missouri and the Battle of Island Number Ten. He was involved in numerous major battles, including the Second Battle of Corinth, where he commanded a division of infantry of the Army of the Mississippi, and the Battle of Stones River, in which he led the cavalry of the Army of the Cumberland. On March 11, 1863, Stanley was appointed major general to rank from November 29, 1862. Stanley also led the Union cavalry in the Tullahoma Campaign. He fell ill late in 1863 and missed the Battle of Chickamauga. In 1864, he fought under William Tecumseh Sherman as a division commander in the IV Corps of the Army of the Cumberland during the Atlanta Campaign, and he was promoted to command of the corps when Maj. Gen. Oliver O. Howard was named commander of the Army of the Tennessee. After the capture of the city, instead of employing him marching to the sea, Sherman dispatched Stanley and his IV Corps to Tennessee to help protect the state from invasion by John Bell Hood's Army of Tennessee.
Links: a. Army of Tennessee b. Missouri c. Battle of Chickamauga d. John Bell Hood

Ex Output:
c

Ex Input:
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 191920, but did not feature in the 1920 FA Cup Final, which ended in a 10 victory over Huddersfield Town at Stamford Bridge. He appeared just 11 times in 192021, before going on to make 47 appearances in the 192122 campaign, as the "Villans" finished fifth in the First Division. He scored nine goals in 37 games in 192223 and five goals in 43 games in 192324. He also appeared at Wembley in the 1924 FA Cup Final, in a 20 defeat to Newcastle United. He scored seven goals in 34 matches in 192425, before hitting 20 goals in 44 appearances in 192526. He bagged 13 goals in 43 games in 192627, before being limited to just four goals in 30 appearances in 192728. He rediscovered his scoring form with 18 strikes in 48 matches in 192829, before hitting seven goals in 32 games in 192930. However he played just four times in the 193031 campaign, as Villa finished second in the league with an English record of 128 top-flight league goals scored.
Links: a. 192324 Football League b. Royal Air Force c. Huddersfield Town A.F.C. d. Royal Air Force

Ex Output:
b

Ex Input:
Question: Who finished first i the all-around at the 2015 Lisboa World Cup? Passage:In 2015 Season, Romanova's first competition was at the 2015 L.A. Lights where she finished 5th in the all-around. At the 2015 Valentine Cup, she won bronze medals in the all around, hoop, ball and placed 4th in clubs and ribbon. In March 1415, Romanova competed at the 2015 Baltic Hoop finishing 5th in all-around, she took silver in ball and bronze in hoop finals. In March 2729, Romanova competed at the 2015 Lisboa World Cup finishing 11th in the all-around. In April 1012, Romanova finished 16th in the all-around at the 2015 Pesaro World Cup. Romanova with teammates (Ganna Rizatdinova, Viktoria Mazur) competed at the 2015 European Championships where Team Ukraine won bronze. Romanova competed at the 2015 Holon Grand Prix finishing 12th in all-around and qualified to 1 event final. In June 1521, Romanova competed at the inaugural 2015 European Games where she finished 16th in the all-around. In August, Romanova finished 18th in the all-around at the 2015 Sofia World Cup behind Varvara Filiou. In September 913, Romanova (together with teammates Ganna Rizatdinova and Viktoria Mazur) competed at the 2015 World Championships in Stuttgart, with Team Ukraine taking bronze. Romanova also dramatically qualifies to the individual all-around finals (0,008 points ahead of Viktoria Mazur), but misses it due to the foot injury (she was substituted by Viktoria Mazur).
Links: a. Viktoria Mazur b. 2015 FIG Rhythmic Gymnastics World Cup series c. Stuttgart d. 2015 FIG Rhythmic Gymnastics World Cup series

Ex Output:
b