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 are the primary producers on earth., Question: Bacteria in the soil convert what type of gas into a form that is used by producers? (A) energy (B) burning (C) food (D) Energy. (E) nitrogen (F) nutrients (G) Cooking (H) a solute
E