Detailed Instructions: 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.
Problem:Question: Who was the headmaster of Gordonstoun at that time? Passage:John H. Mercer was the third child of Harriet and John W. Mercer. He was educated at private schools in Cheltenham and, later, at Gordonstoun in Scotland. During World War II he served in the British Merchant Marines (1940–46) as a radio man. After the war he went to University of Cambridge and studied geography. At that time he came under the influence of William Vaughan Lewis. After finishing his B.A. in 1949 Mercer went to Canada, where he received his PhD in geography from McGill University in 1954. He was a Research Scholar from 1954 to 1956 at the Australian National University in Canberra, where he studied land use and population in western Samoa. He returned to Canada and worked in the Canadian Hydro-graphic Office in Ottawa as a geographer in 1957 and 1958. During 1959–60, 1961–62, 1964, and 1966, the American Geographical Society employed him at its World Data Center A for Glaciology in New York. The turning point in his career as a glaciologist was in 1960, when he became a Research Associate at The Ohio State University, in the Institute of Polar Studies (renamed the Byrd Polar Research Center). He remained at The Ohio State University until his death, becoming its first Senior Research Scientist.
 Links: a. McGill University b. Gordonstoun c. Lewis Glacier (Antarctica) d. Samoa
Solution:
b