In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

Example Input: Jenny was outside facing her house holding a compass. The needle of the compass was facing her house. Staying in one place she turned around and around, stopping several times. She noticed that whichever way she faced (A) the compass's needle was facing straight ahead (B) the compass's needle was facing the house (C) the compass's needle was facing her back (D) the compass's needle was facing the west
Example Output: B

Example Input: What becomes smoother through weathering? (A) rainbow (B) water (C) cat (D) pumice
Example Output: D

Example Input: Frogs are unable to give live birth, and their eggs are soft, unlike other eggs, in fact (A) frog eggs are sour (B) frog eggs are transparent (C) frog eggs are yellow (D) frog eggs are hollow
Example Output:
B