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: A life vest floating in calm water has low friction while one floating in choppy water has high friction. Question: Which type of water will allow the life vest to float the furthest? (A) calm water (B) choppy water
Example Output: A

Example Input: Sentence: A skateboard wheel gets hotter when rolling over a gravel driveway compared to rolling over a dirty path. Question: Which surface is providing more friction? (A) gravel driveway (B) dirty path
Example Output: A

Example Input: Sentence: Supposed you were standing on the planet Earth and Mercury. Question: When you look up in the sky and see the sun which planet would the sun appear larger? (A) Mercury (B) Earth
Example Output:
A