Given the task definition and input, reply with output. 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: Glucose is used for energy by the cells of most organisms., Fact2: After hours of no glucose ingestion, fats and proteins can be used for energy., Question: ats and proteins can be used for energy by the cells of what? (A) mammals (B) Plants growth (C) Most plants (D) our planet (E) microorganisms (F) bacteria (G) most organisms (H) animals
G