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").
Example: Fact1: a plant requires sunlight to grow, Fact2: Plants to avoid are fast-growing vines that can take over an area in no time., Question: What requires sunlight in order to take over an area? (A) spores (B) fish (C) plants (D) humans (E) pods (F) Oak (G) opossums (H) coral
Example solution: C
Example explanation: This is a good example. Based on the facts plants require sunlight in order to take over an area.

Problem: Fact1: Marine species live mainly in shallow coastal waters., Fact2: Many marine species are used for medical research., Question: what are many organisms found in shallow coastal waters used for? (A) heat produced (B) survival (C) surf boards (D) density (E) heat energy (F) Animal survival (G) shoes (H) medical research

Solution: H