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").

Input: Consider Input: What is a source of oxygen through photosynthesis? (A) lakes (B) car engines (C) sunflowers (D) people

Output: C


Input: Consider Input: Solar energy is adsorbed by (A) planted flowers under the moonlight (B) potted flowers in a windowless room (C) planted flowers on a bright, clear day (D) seeds that have just been planted in the ground

Output: C


Input: Consider Input: In the food chain process what has the role of producer? (A) eaters (B) flora (C) carnivore (D) consumers


Output: B