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 tracks did the album released in 2004 have? Passage:Fulber rejoined the band in 2003. The reunited duo released the single "Maniacal" in October of that year. The single peaked at No. 15 on Billboards Hot Dance Singles. The next year, they released the studio album Civilization, which landed the No. 2 position on the German Alternative Albums chart. Peterson later rejoined the band to release Artificial Soldier in 2006. It was the first album to feature new members Jeremy Inkel and Jared Slingerland. The album peaked on Billboards Top Dance/Electronic Albums chart at No. 19. After a problem with the tour bus company, the US tour that year was cut short, and the band returned home to Vancouver after playing roughly half of their scheduled dates; performances in New York and Canada were cancelled. The band toured in Europe in August 2006, playing in 18 cities.
Links: a. 2003 in music b. Civilization (album) c. 2006 in music d. Civilization (album)
Example Output: b

Example Input: Question: The year that Debeaumarche was transported from Pantin to Buchenwald, which area was more populated during that time? Passage:He was arrested on 3 August 1944 at the Gare Montparnasse, and questioned harshly by the Gestapo at the Rue des Saussaies. He lost consciousness under the beatings but did not divulge any names; he was subsequently held at Fresnes Prison. Debeaumarche was one of the so-called "77,000" (named for the prisoners' numbers, between 76,000 and 78,000), Fresnes prisoners who were transported by train from Pantin to Buchenwald on 15 August 1944. He was moved to the underground factory of Mittelbau-Dora which produced V-1 flying bombs and V-2 rockets, and posing as an electrical engineer was put to work in the manufacture of the V-1. Maurice Naegele, a Kapo in the tunnel assembly section, gained the trust of Debeaumarche by relating details of the resistance movement in France. In fact Naegele had been an agent of the Gestapo, before his deportation. Naegele denounced Debeaumarche to SS-Oberscharfuhrer Sander, head of surveillance at Mittelbau-Dora. Debeaumarche was arrested with others (including Naegele) on the night of 34 November 1944. They were taken to the Niedersachswerfen SD headquarters, where Naegele attempted to beat confessions out of the other prisoners. Debeaumarche was sentenced to death on 11 November 1944, but the sentence was not carried out. Instead Debeaumarche was held in solitary confinement, accused of anti-Nazi plotting. In April 1945 he was moved to Bergen-Belsen, where he was liberated during the advance of Allied troops on 15 April 1945 and repatriated to France. On 1 May 1945 he marched down the Champs-Elysees alongside fellow Buchenwald-captive Pierre Dejussieu-Pontcarral.
Links: a. Oberscharfuhrer b. Pantin c. Buchenwald concentration camp d. Buchenwald concentration camp
Example Output: b

Example Input: Question: How many people graduate from the Air Command and Staff College in a year? Passage:Vandenberg graduated from the United States Military Academy in 1951 (where Buzz Aldrin was one of his classmates). In 1953, Vandenberg was assigned to the 86th Fighter-Bomber Wing. Later he would serve as a flight commander with the 413th Tactical Fighter Wing and the 31st Tactical Fighter Wing. He graduated from the Air Command and Staff College in 1961, after which he was assigned to the 4th Tactical Fighter Wing. In 1963, Vandenberg was appointed Operations Officer with the 23rd Tactical Fighter Squadron. During the Vietnam War, Vandenberg commanded the 390th Tactical Fighter Squadron. Upon returning stateside he was assigned to The Pentagon to work in the Office of the Director of Plans. He would graduate from the National War College in 1969 and return to The Pentagon to work with the Joint Chiefs of Staff. In 1971, Vandenberg became commander of the 12th Flying Training Wing. Vandenberg was named Vice Commandant of Cadets at the United States Air Force Academy in 1972. He would serve as Commandant from 1973 to 1975, during which time he assumed the rank of brigadier general. From 1976 to 1979, Vandenberg served at Headquarters U.S. Air Force, first as Deputy Director of Plans, later as Director of Operations and Readiness, and finally as Assistant Deputy Chief of Staff for Operations, Plans, and Readiness. Vandenberg was ultimately named Vice Commander in Chief of the Pacific Air Forces. His retirement was effective as of January 1, 1981.
Links: a. Pacific Air Forces b. Air Command and Staff College c. Pacific Air Forces d. 12th Flying Training Wing
Example Output:
b