单选题 The representative presented to the committee a ______ signed by 1,200 electors asking for a thorough probe into the financial scandal surrounding the candidate for the regional legislator.

A、 post
B、 letter
C、 petition
D、 paper

【正确答案】 C

【答案解析】a petition signed by 1,200 electors意为“1200名选民签署的请愿书”。petition请愿书，诉状。