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: Humming birds may help the growth of (A) cars (B) buildings (C) ants (D) tulips
Example Output: D

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: Wind blowing southwest at high speeds can, when interacting with a car moving southwest at high speeds, (A) break the car's speed (B) stall the car's speed (C) slow the car's speed (D) heighten the car's speed
Example Output:
D