You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct option for the given question. Write down the answer index: 'A' or 'B'.

Ex Input:
Sentence: Rebecca rolls the globe in her classroom over a book and then the carpeting. Rolling it over the book generates less heat than on the carpet. Question: Which surface has more resistance? (A) book (B) carpeting

Ex Output:
B


Ex Input:
Sentence: A pair of glasses experiences low resistance when slid across a counter, but high resistance when slid across an office desk. Question: Which surface will cause the glasses to get hotter as they travel across it? (A) counter (B) desk

Ex Output:
B


Ex Input:
Sentence: A sapling and an older tree are standing in a forest. The older tree's trunk is wider than the sapling's trunk. Question: In a windstorm, which will stand up longer? (A) sapling (B) older tree

Ex Output:

B