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 event includes melting? (A) making ice (B) cooking in butter (C) cutting carrots (D) buttering bread
Example Output: B

Example Input: A needle lined with magnets will pull north. If north is to the right and you want to go west, you'd walk (A) straight (B) left (C) backwards (D) right
Example Output: A

Example Input: which of these would lead to a rise in speed and acceleration? (A) a person running behind and kicking a balloon (B) a person sitting still (C) a person standing in place (D) a person stopping an oncoming ball
Example Output:
A