Given the task definition and input, reply with output. 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.

Question: In what city did Prettejohn get her Master of Arts? Passage:Prettejohn was the Professor of the history of art at the University of Bristol from 2005, before becoming head of the history of art at the University of York in 2012. She has also been the Professor of Modern Art at the University of Plymouth and the curator of Paintings and Sculpture at Birmingham Museum and Art Gallery. She studied at Harvard University, where she got her Bachelor of Arts degree (summa cum laude), and at the Courtauld Institute of Art, where she got her Master of Arts degree in 1987 and PhD degree in 1991. She is married to the Professor of Classics and Dean of Arts, Charles Martindale.
Links: a. University of Plymouth b. Birmingham Museum and Art Gallery c. Courtauld Institute of Art d. Modern art
c