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").
Problem:Fact1: Echinoderms use pheromones to communicate with each other., Fact2: Modern echinoderms include starfish and sea urchins., Question: How do starfish communicate? (A) huddle together (B) sound (C) interact (D) Vibrates (E) wave in air (F) during the day (G) Decibels (H) Pheromones
Solution:
H