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").
Input: Fact1: Insects may live in large colonies and have complex social behaviors., Fact2: Ants are social insects that live in a colony., Question: what have complex behaviors? (A) otters (B) atoms (C) ants (D) Wasps (E) volume (F) h2o (G) Birds (H) cats
Output:
C