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'.

Example Input: Sentence: Mitch is rolling wagons down a hill at the same time. The red wagon goes to the bottom of the hill, but the black wagon stops halfway down the hill. Question: Which wagon was slower? (A) red wagon (B) black wagon
Example Output: B

Example Input: Sentence: James is a submarine operator who knows that the pacific ocean isn't as rough as the atlantic ocean. The atlantic ocean has more friction. Question: Which ocean can he drive his submarine quicker in? (A) pacific ocean (B) atlantic ocean
Example Output: A

Example Input: Sentence: To save money, the contractor stopped buying the costlier wall supports he was required to use and started using some cheaper ones instead. As a result, several roofs collapsed. Question: Which wall supports were thinner? (A) The expensive wall supports were thinner (B) The cheaper wall supports were thinner
Example Output:
B