You will be given a definition of a task first, then some input of the task.
In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: Plants release oxygen during the day but not during the night., Fact2: All orange trees are plants., Question: What release oxygen during the day but not at night? (A) sea anenomes (B) Organic compounds (C) orange trees (D) coral (E) power stations (F) humans (G) swamp vegetation (H) important habitats
Output:
C