TASK DEFINITION: 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.
PROBLEM: Sentence: Both Linda and Keith leave for work at the same time. Linda drives in her car and Keith is walking. Question: If they've both been traveling for two hours, who is more likely to have covered less distance? (A) Linda (B) Keith

SOLUTION: Keith

PROBLEM: Sentence: A dirty tooth isn't as smooth as a clean tooth. Question: Which surface will a toothbrush move over at a greater rate of speed? (A) dirty tooth (B) clean tooth

SOLUTION: clean tooth

PROBLEM: Sentence: A huge bus and a little car were stopped at an intersection. The light turned green. Question: Who made it across the intersection first? (A) the car (B) the bus

SOLUTION:
the car