Definition: 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: Infancy is the period of most rapid growth after birth., Fact2: Infancy and early childhood are times of rapid growth and development., Question: what is rapid in childhood? (A) shrinking (B) pigmentation (C) school (D) development (E) flower secretion (F) swelling nodes (G) magnetism (H) movement
Output:
D