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: if a person wanted some mineral graphite, where might they likely find some? (A) in the potato bread for breakfast (B) in a pencil for drawing class (C) in the vanilla ice cream (D) in the flower of a plant
Example Output: B

Example Input: Once the grounds frost over and the air grows chilled (A) beaches are opened (B) humans go naked (C) birds lay eggs (D) roses die
Example Output: D

Example Input: Rocks may be rounded by (A) photosynthesis (B) audio feedback (C) hydro-erosion (D) Cloudy conditions
Example Output:
C