Definition: 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").
Input: Fact1: Insects may live in large colonies and have complex social behaviors., Fact2: Insect colonies Insect colonies are families because all members are close relatives., Question: Insects have more social behaviors because all what? (A) have a positive impact on the environment (B) it helps plants in growing (C) retaining heat (D) mate with females (E) produce offspring (F) family members are relatives (G) characteristics (H) sub-units of species
Output:
F