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").
Q: Fact1: webbed feet are used for moving faster through water by aquatic animals, Fact2: Aquatic animals moving through water are also subject to the principles of aerodynamics., Question: Aquatic animals in water use webbed feet due to what? (A) ability to sense light (B) principals of aerodynamics (C) kinetic energy (D) swimming slower (E) refraction of light (F) poor swiming (G) bending light rays (H) dynamic relationships
A:
B