You will be given a definition of a task first, then some input of the task.
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: Of the soaps that Maynard has appeared in, which is the oldest? Passage:Her television work has included playing the heroine Cora in The Last of the Mohicans in 1971, then the children's Sci-Fi classic Escape Into Night playing a Governess called Miss Chesterfield from 19 April to 24 May 1972 and Tom Baker's first story line in Doctor Who in 1974-75, Robot, playing chief villain Miss Winters. Two films for television in the 1970s, When Day is Done, co-starring with Edward Woodward, and Lives of our Own. Her TV series have included This Year, Next Year about Yorkshire hill farmers, General Hospital, playing the gynaecologist, with Lynda Bellingham, Strike it Rich - two series in the 1980s - and guest appearances in The Sweeney, Minder (for which she wrote the lyrics to the show's theme song - "I Could Be So Good For You"), Jemima Shore Investigates, The House of Eliott, and Campion. She has appeared in most of the soaps of the time Coronation Street, Emmerdale Farm, Casualty, Holby City, Crossroads and EastEnders, where she played the part of Edwina Dunn, the mother of Laura Beale, who was played by her daughter Hannah.
Links: a. The Sweeney b. Tom Baker c. Edwina Dunn d. Coronation Street
Output:
d