Detailed Instructions: 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").
Q: Fact1: Producers are organisms that produce food for themselves and other organisms., Fact2: Producers are the base of the food chain., Question: What does the base of the food chain provide food for? (A) It helps them survive (B) sediments (C) Most plants (D) other organisms (E) our planet (F) energy systems (G) fruits (H) Animal survival
A:
D