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: Which is most harmful to a human? (A) dynamite going off (B) reading email (C) balloons popping (D) opening a soda
Example Output: A

Example Input: Offspring receive genes from their parents via what? (A) gene therapy (B) documents (C) double helix (D) paperwork
Example Output: C

Example Input: Which of the following is correct? (A) The earth's strong gravitational pull causes a waxing gibbous to form (B) astrology causes a waxing gibbous to form (C) star maps cause a waxing gibbous to form (D) government satellites cause a waxing gibbous to form
Example Output:
A