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 long was Ron Hughes Commander? Passage:Dunstan was then posted to the 1st Battalion, Royal Australian Regiment (1 RAR) as second-in-command in 1953. He then saw service in Korea including a period as Military Assistant to the Commander in Chief of the British Commonwealth Forces Korea, and was appointed a Member of the Order of the British Empire in the 1954 New Year Honours. Between May 1964 and February 1965, Dunstan commanded 1 RAR, before later holding an appointment at the 1st Recruit Training Battalion. Having reached the rank of colonel, in early 1968 he was deployed to Vietnam as deputy commander of the 1st Australian Task Force (1 ATF). He took over from Brigadier Ron Hughes as Commander of the 1 ATF on 21 May 1968 during the Battle of Coral–Balmoral. For his services during this battle, he was appointed a Commander of the Order of the British Empire in 1969.
 Links: a. 1st Battalion, Royal Australian Regiment b. Order of the British Empire c. Brigadier d. 1954 New Year Honours

A: b
****
Q: Question: How large was the endowment at Durham University the year that Mitchell started attending the school? Passage:Mitchell was born in London, and educated at Brightlands Preparatory School and Dulwich College, London. In 1943 he registered as a conscientious objector and his war-time service was spent in the Non-Combatant Corps. After the war, he taught at Oakfield Preparatory School, London and in 1947 founded and edited the journal Music Survey; several issues appeared before he was joined in 1949 by Hans Keller and the journal was re-launched in the Music Survey's so-called 'New Series' (1949–52), whose uncompromising critical standards and pugnaciously pro-Britten and pro-Schoenberg stance brought it renown and notoriety in equal measure. Mitchell studied at Durham University 1949-50. In the 1950s he was a regular contributor to the journals Musical Times and Musical Opinion. In 1958 he became editor of Music Books at Faber and Faber and in the same year was appointed Editor of Boosey & Hawkes's music journal Tempo, until 1962. From 1963 to 1964 he was a special music adviser at Boosey & Hawkes with particular responsibility for contemporary music and the acquisition of contemporary composers. He was responsible for Peter Maxwell Davies and Nicholas Maw joining the publisher's list. In 1965, with the encouragement of Benjamin Britten he founded the music-publishing firm of Faber Music, and was its first Managing Director (vice-chairman, 1976, chairman, 1977, president, 1988–95). In 1972 he became the first Professor of Music at Sussex University (until 1976). Following the death of Benjamin Britten, Mitchell became a senior trustee of the Britten-Pears Foundation; in 1986 he became the Foundation's director and chairman of the Britten Estate Ltd. From 1989 to 1992 he was chairman of the Performing Right Society. He was appointed a CBE in the 2000 New Year Honours, and died on 28 September 2017.
 Links: a. Non-Combatant Corps b. Oakfield Preparatory School c. Nicholas Maw d. Durham University

A: d
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Q: Question: In what county did Brandenburg begin working as a photojournalist for the Worthington Daily Globe? Passage:Jim Brandenburg was born and raised in Luverne, Minnesota in the farms and prairies of Southwestern Minnesota, USA. After studying at Worthington Community College, he went on to attend the University of Minnesota Duluth, where he majored in art history and worked for the local public television station. Upon graduating, he returned to Worthington, Minnesota and began working as a photojournalist for the Worthington Daily Globe. Within months, he began submitting work to the National Geographic Society as a freelance photographer, and in 1978 he became a contract photographer for National Geographic Magazine. Additionally, his photography has been published in a number of National Geographic Society books including "Journey Into China", "Heart of a Nation" and "Discovering Britain and Ireland", in which his photos of the Highlands in Scotland were featured.
 Links: a. Minnesota West Community and Technical College b. Worthington, Minnesota c. University of Minnesota Duluth d. Worthington, Minnesota

A:
b
****