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 professional boxers did Garcia train? Passage:Despite being forced to retire from pro boxing Díaz kept in shape by lifting weights at a local gym. The gym owner was impressed with Díaz physique and work ethics and recommended he become a luchador. Díaz was originally trained by Ray Carrasco and later also trained under Rogelio de la Paz, Genaro Contreas, Raul Rojas and Daniel García; the latter would later be famous under the name of "Huracán Ramírez". Díaz made his professional wrestling debut in 1954, using the ring name "El Pelón" (Spanish for "Baldy") Chato Díaz, then later on worked under names such as "Indio" Mendoza, El Rayo Rojo and El Hombre del Rayo Rojo. He also worked for a while as an enmascarado (masked) character called Gargantua between 1954 and 1955. In 1955 Díaz came up with the ring name "Ray Mendoza" after his mentor Ray Carrasco and his wife's maiden name Mendoza. As Mendoza he quickly forged a very effective Rudo character ("bad guy") by using well developed physique and charisma to create a ring character that the fans loved to hate. In 1956 Mendoza began working for Salvador Lutteroth's Empresa Mexicana de Lucha Libre (EMLL), the world's oldest and Mexico's largest wrestling promotion. He made his debut at EMLL's main arena Arena Coliseo in February, 1956 in a Battle Royal that also included EMLL headliners Gory Guerrero, El Santo, Cavernario Galindo, Blue Demon and Black Shadow, a match that immediately established him as someone who Lutteroth saw potential in. In EMLL Mendoza struck up a friendship with René Guajardo and Karloff Lagarde out of the ring and a "partnership in crime" in the ring as the three became one of the most hated trio in lucha libre at the time. The three drew full houses all over Mexico, setting box office record after box office record as they faced técnicos(good guys) such as El Santo, Rayo de Jalisco or Blue Demon. They also had a very financially successful feud with Los Espantos (Espanto I, Espanto II, and Espanto III) in what at the time was a rare rudo vs. rudo feud. Outside the ring Mendoza, Guajardo and Lagarde often spoke out on behalf of the wrestlers, demanding higher pay and better conditions, and since they were able to generate a lot of ticket sales EMLL officials listened to their demands.
 Links: a. Rayo de Jalisco Sr. b. Face (professional wrestling) c. Salvador Lutteroth d. Huracán Ramírez
[A]: d


[Q]: Question: How many people died in the incident that contaminated about 30,000 km?  Passage:Natural strontium is a mixture of four stable isotopes: Sr, Sr, Sr, and Sr. Their abundance increases with increasing mass number and the heaviest, Sr, makes up about 82.6% of all natural strontium, though the abundance varies due to the production of radiogenic Sr as the daughter of long-lived beta-decaying Rb. Of the unstable isotopes, the primary decay mode of the isotopes lighter than Sr is electron capture or positron emission to isotopes of rubidium, and that of the isotopes heavier than Sr is electron emission to isotopes of yttrium. Of special note are Sr and Sr. The former has a half-life of 50.6 days and is used to treat bone cancer due to strontium's chemical similarity and hence ability to replace calcium. While Sr (half-life 28.90 years) has been used similarly, it is also an isotope of concern in fallout from nuclear weapons and nuclear accidents due to its production as a fission product. Its presence in bones can cause bone cancer, cancer of nearby tissues, and leukemia. The 1986 Chernobyl nuclear accident contaminated about 30,000 km with greater than 10 kBq/m with Sr, which accounts for 5% of the core inventory of Sr.
 Links: a. Rubidium b. Mass number c. Electron capture d. Chernobyl disaster
[A]: d


[Q]: Question: What state did Alley receive an Artium Baccalaureus? Passage:Born in Portland, Oregon, Alley received an Artium Baccalaureus from Stanford University in 1952 and was a lieutenant in the United States Army during the Korean War, from 1952 to 1954. He received a Juris Doctor from Stanford Law School in 1957, and was a law clerk on the Supreme Court of Oregon, in Salem, Oregon in 1957, and then in private practice in Portland from 1957 to 1959. He returned to the military as assistant staff judge advocate, U. S. Army Artillery and Missile Center, Fort Sill, Oklahoma, 1959–1960 and then as assistant staff judge advocate, Headquarters, U. S. Army Ryukyu Islands (Okinawa, Japan), 1960–1964. He was in the Thirteenth Career Class, TJAGSA, 1965, and was a member of the faculty of Judge Advocate General's School in Charlottsville, Virginia, from 1965 to 1968. He was a military judge for the U.S. Army Trial Judiciary in Saigon, Republic of Vietnam, from 1968 to 1969, and at Schofield Barracks in Hawaii from 1970 to 1972. He then served on the U.S. Army Court of Military Review in Falls Church, Virginia, from 1972 to 1975, serving as chief trial judge of that court in 1975. He was chief of the Criminal Law Division, Office of the Judge Advocate General, Department of the Army, in Washington, D.C. from 1975 to 1978, and in the United States Army, judge advocate, in Heidelberg, Germany, from 1978 to 1981. He was dean and professor of law at the University of Oklahoma College of Law, in Norman, Oklahoma, from 1981 to 1985.
 Links: a. Stanford University b. Korean War c. Portland, Oregon d. Portland, Oregon
[A]:
a