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: Scales (A) measure how much belly fat the user has (B) measure height of the user (C) help users know if they need to drop some lbs. (D) help users determine their blood sugar levels
Example Output: C

Example Input: What conducts electricity? (A) a lego brick (B) suit of armor (C) a wooden table (D) a T-shirt
Example Output: B

Example Input: Why is acid rain unhealthy? (A) because it causes drought (B) because it evaporates too quickly (C) It contains various detrimental particles from the air (D) because it causes algae growth
Example Output:
C