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: Was the Herald the first plane to use a turboprop? Passage:Jersey Airlines was an early post-World War II private, independent British airline formed in 1948. In 1952, the airline operated its first scheduled service. Four years later, British European Airways (BEA) took a 25% minority stake in Jersey Airlines and made it an "associate". In June 1958, a Jersey Airlines de Havilland Heron became the first commercial airliner to arrive at the newly reconstructed Gatwick Airport. In 1960, Jersey Airlines ordered four state-of-the-art Handley Page Dart Herald 200 series turboprops. By 1962, BEA had sold its 25% minority holding in Jersey Airlines. The same year, Jersey Airlines became part of the British United Airways (BUA) group of companies. In August 1963, Jersey Airlines changed its trading name to British United (C.I.) Airways. Following the BUA group's 1967/8 reorganisation, BUA (C.I.) was absorbed into British United Island Airways (BUIA) in November 1968.
Links: a. British United Island Airways b. United Kingdom c. British United Airways d. Turboprop
A:
d