Q: 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.
Sentence: Terry was bringing his car to the mechanic to check the tire light sensor that had been going on and off for a couple of days. The light was currently off and he wanted it to go on by the time he got to the mechanic so they could see what he was talking about. Terry had the choice of driving on a gravel road or an asphalt road to get to the mechanic. Both roads took the same amount of time. Question: Which road would create more heat against Terry's tires, better guaranteeing the tire light sensor would go on? (A) gravel (B) asphalt
A:
gravel