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: All cnidarians are aquatic., Fact2: Cnidarian tentacles serve to capture prey., Question: All aquatic tentacles serve to what? (A) feel ships (B) oppose octopus (C) smack jellyfish (D) Major effects (E) travel (F) capture prey (G) communication (H) saves lives
Output:
F