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.

Let me give you an example: Sentence: Jacob and Benny are squatting at the gym. Jacob has thin frail legs and Benny has big strong legs. Question: Who squats less weight? (A) Jacob (B) Benny
The answer to this example can be: Jacob
Here is why: Typically, people with thin frail legs squat less weight than people with big strong legs, so the answer is Jacob.

OK. solve this:
Sentence: A skittle rolls at a lesser rate of speed in a bag compared to a box. Question: Which surface will make the skittle heat up less when rolling around? (A) bag (B) box
Answer:
box