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: Infancy is the period of most rapid growth after birth., Fact2: Learning begins in infancy., Question: When does learning begin? (A) west of Africa (B) translation (C) after birth (D) in the beehive (E) Synchronous (F) road bends (G) in adulthood (H) the Himalayas
A:
C