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: A grapefruit can roll a greater distance across an orchard compared to one rolling across a cannery. Question: Which surface will make the grapefruit get hotter? (A) orchard (B) cannery

Ex Output:
B

Ex Input:
Sentence: The planet Saturn has more mass then the planet Mercury. Question: Which plant has less of a gravitational field? (A) Saturn (B) Mercury

Ex Output:
B

Ex Input:
Sentence: Sarah brushed her hair. Some fell off and turned into a hairball on the bathroom rug. Then Joe walked across the bathroom. The hairball moved a foot across the rug. then it moved a few inches across the pile of laundry next to the rug. Question: On which of these areas did the hairball encounter more friction? (A) bathroom rug (B) pile of clothes

Ex Output:
B