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.

Example 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
Example Output: c

Example Input: Question: What country are these cities part of? Passage:Following its involvement in The Troop, FujiFilm commissioned Glory Film Co. to make a series of films to demonstrate its new motion picture filmstocks. For these projects Glory employed leading cinematographers: Oscar-winners Jack Cardiff OBE, BSC, ASC, (The African Queen) and Ronnie Taylor BSC (Gandhi) together with Phedon Papamichael ASC (Walk the Line), John de Borman BSC (The Full Monty), Sue Gibson BSC (Spooks), Thierry Arbogast AFC (The Fifth Element), Ron Stanett CSC (Evel Knievel) and Tony Pierce-Roberts BSC (A Room With a View). The films were shot at Pinewood (LightsII) and Shepperton studios (Lights II, Return of The Shadow), with locations including Hastings in East Sussex (The Glow). 'Lights II' (2005) featured the last cinema performance of John Mills (at age 96). He played a tramp and was photographed by cinematographer Jack Cardiff, himself 90 years old.
Links: a. Phedon Papamichael b. Hastings c. Jack Cardiff d. Jack Cardiff
Example Output: b

Example Input: Question: Did Squires perform more with Geraldo or Cyril Stapleton? Passage:When Squires became a professional singer she performed with big bands such as Ted Heath, Geraldo and Cyril Stapleton. She also sang with the smaller jazz bands of Max Harris, Kenny Baker and appeared in the BBC Festival of Jazz at the Royal Albert Hall with the Alan Clare band. She moved from Salisbury to London in 1948 at 20 years of age. In the 1950s and 60s she became a regular on the BBC Light Programme (now BBC Radio 2) on programmes like Melody Time and Workers' Playtime. Squires worked in the United States with Danny Kaye and Sammy Davis Jr., as well as appearing on the Johnny Carson Show. In 1994 Squires was part of the entertainment for Prince Edward's 30th birthday celebrations. During the 2012 Royal Diamond Jubilee year Squires undertook two countrywide tours to celebrate her own diamond jubilee in show business including two appearances at the Royal Festival Hall.
Links: a. Cyril Stapleton b. Workers' Playtime (radio programme) c. Geraldo d. Prince Edward, Earl of Wessex
Example Output:
c