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: exercise increases a body 's strength, Fact2: Isometric exercise is a sustained contraction of large muscles, such as weight lifting., Question: Sustained contraction of large muscles in a body leads to what? (A) rapid expansion (B) increased body hair (C) prolactin release (D) recovery time from fatigue (E) increased IRA balance (F) increased pupil dilation (G) increased body strength (H) staying warm
A: 
G