instruction:
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.
question:
Sentence: Bob took his toy car outside to play with it. He rolled it on the street and then he rolled it in the grass. He noted that the toy car rolled much faster in the street. Question: Which surface caused more friction? (A) The street (B) The grass
answer:
The grass

question:
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
answer:
Keith

question:
Sentence: There were two dogs barking on my block: my dog who was next to me and the dog farther down the street. Question: Which dog sounded quieter to me? (A) my dog (B) my neighbor's dog
answer:
my neighbor's dog