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: Grasses supply most of the food consumed by people worldwide., Fact2: Grasses are an important source of food for people as well as animals., Question: What relies on grass as a food source? (A) Bacteria (B) Soil (C) humans (D) More grass (E) perennials (F) alpacas (G) Animals (H) tortoises
G