Please answer the following question: Write a multi-choice question for the following article, with the given choices and answer: Article: Baroness Thatcher, Britain's greatest post-war prime minister, died at the age of 87 after suffering a stroke (a disease related to blood vessels in the brain), her family announced on 8 April 2013. Her son, Sir Mark, and daughter Carol confirmed her death that morning. zxxk Margaret Thatcher, daughter of a businessman and mayor of Grantham, was educated at the local grammar school, and at Oxford, where she got a degree in chemistry, and upon graduation she worked for four years as a research chemist. She then qualified as a lawyer in 1954. As Miss Margaret Roberts, she stood twice in parliamentary elections for the Conservative Party , before being elected (after her marriage) to the House of Commons in 1959. When the Conservatives returned to office in June 1970, she was appointed secretary of state for education and science. After the Conservatives lost power in 1974, she was appointed to the Shadow Cabinet , and was elected leader of the Conservative Party in 1975. Baroness Thatcher became prime minister on 4 May 1979 and went on to earn the nickname "the Iron Lady", becoming known for her strong responses to the political and economic crisis, which Thatcher's supporters think are good for Britain, while her opposers argue that her policies destroyed British manufacturing. Lady Thatcher governed Britain from 1979 to 1990. She will go down in history not only as Britain's first female prime minister, but as the woman who changed Britain's economy in addition to being an awesome rival on the international stage. zxxk Lady Thatcher was the only British prime minister to leave behind a set of ideas about the role of the state which other leaders and nations try to copy and apply. Options: A 64 B 53 C 87 D 45 Answer: B 53 Question:
Answer:
How old was Lady Thatcher when she became prime minister?