Detailed Instructions: You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct answer (return the string of the correct option, not 'A' or 'B') for the given question.
Q: Sentence: Two people were driving to a destination. One person was driving a tank and the other person was driving a car. Question: Which thing was fastest to speed up? (A) The tank (B) a car
A:
a car