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: What age bracket plays for the Real Madrid's youth system? Passage:Casillas began his career in Real Madrid's youth system, known as La Fábrica, during the 1990–91 season. On 27 November 1997, at age 16 and still a junior, he was first called up to the senior team squad to face Rosenborg in the UEFA Champions League, although he remained on the bench throughout. After spending a season with the C-team in the fourth tier, during which they won their regional group, he came into contention as the club's first-choice between the posts. In starting the 1999–2000 UEFA Champions League group stage fixture against Olympiakos on 15 September 1999, he became the youngest goalkeeper ever to feature in the competition at the time, aged 18 years and 177 days; a record which was only broken in October 2017 by Mile Svilar. Three days earlier, Casillas had made his La Liga debut in a 2–2 draw against Athletic Bilbao at San Mamés Stadium. In May 2000, he became the youngest ever goalkeeper to play in and win a Champions League final when Real Madrid defeated Valencia 3–0, just four days after his 19th birthday.
 Links: a. Olympiacos F.C. b. Real Madrid CF (youth) c. La Fábrica d. Real Madrid CF (youth)
[A]: b


[Q]: Question: How often are new issues of the Canadian Journal of Neurological Sciences published? Passage:Multi-dose versions of the vaccine contain the preservative thiomersal (also known as thimerosal), a mercury compound that prevents contamination when the vial is used repeatedly. Single-dose versions and the live vaccine do not contain this preservative. In the U.S., one dose from a multi-dose vial contains approximately 25 micrograms of mercury, a bit less than a typical tuna fish sandwich. In Canada, different variants contain five and 50 micrograms of thimerosal per dose. The use of thiomersal has been controversial, with claims that it can cause autism and other developmental disorders. The U.S. Institute of Medicine examined these claims and concluded in 2004 that the evidence did not support any link between vaccines and autism. Other reviews came to similar conclusions, with a 2006 review in the Canadian Journal of Neurological Sciences stating that there is no convincing evidence to support the claim that thimerosal has a causal role in autism, and a 2009 review in the journal Clinical Infectious Diseases stating that claims that mercury can cause autism are "biologically implausible". The U.K. National Health Service stated in 2003 that "There is no evidence of long-term adverse effects due to the exposure levels of thiomersal in vaccines." The World Health Organization concluded that there is "no evidence of toxicity in infants, children or adults exposed to thiomersal in vaccines". Indeed, in 2008 a review noted that even though thiomersal was removed from all US childhood vaccines in 2001, this has not changed the number of autism diagnoses, which are still increasing.
 Links: a. Thiomersal and vaccines b. Autism c. Canadian Journal of Neurological Sciences d. National Academy of Medicine
[A]: c


[Q]: Question: From what university did the person McGeoch studied under at the University of Chicago graduate? Passage:McGeoch was born on October 9, 1897 in Argyle, New York. He received his bachelor's degree from Westminster College in 1918, and a master's degree from Colorado College in 1919. His master's thesis, titled "The Present Status of Psychology", is a review of the history of the field of psychology and how the role of psychology was viewed in the early 20th century. He then studied under Harvey A. Carr at the University of Chicago. He studied a variety of topics while at the University of Chicago, including suggestibility and intelligence in delinquents, time perception, neuropsychological and vocational testing, and the reliability and validity of the Pressey X-O test. His doctoral dissertation was titled "A study in the psychology of testimony." Following the completion of his dissertation, McGeoch’s work primarily focused on human learning and memory. Harvey Carr significantly influenced McGeoch’s work, and provided feedback on the McGeoch's introductory textbook on human learning, The Psychology of Human Learning, which was published after Carr’s death in 1943. McGeoch completed his PhD while he was a faculty member at the University of Washington. He accepted a full Professor position 2 years later at the University of Arkansas. In 1930 he moved to the University of Missouri where he became the chair of the department of psychology. He held this position for 5 years before moving to Wesleyan University, where he was also chair of the department from 1935–1939 and was awarded an honorary degree in recognition of his accomplishments as a lecturer and administrator. In 1939, McGeoch moved to the University of Iowa, where he also chaired the department. He died in Iowa City on March 3, 1942 from a cerebral hemorrhage.
 Links: a. University of Arkansas b. Pressey X-O test c. Harvey A. Carr d. Harvey A. Carr
[A]:
c