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: bacteria in soil convert atmospheric nitrogen into a form usable by plants, Fact2: Plants have to have nitrogen to grow., Question: What do plants need to grow? (A) energy (B) sunlight (C) nutrients (D) bacteria (E) lifting (F) Energy. (G) muscle (H) darkness
Output:
D