You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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").

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
Solution: C
Why? This is a good example. Based on the facts plants require sunlight in order to take over an area.

New input: Fact1: Puberty is the period during which humans become sexually mature., Fact2: Boys enter puberty at about 12 years of age., Question: When is when boys become sexually mature? (A) death (B) winter (C) trees and flowers (D) 40 years old (E) 5 years old (F) coelenterates (G) 12 years old (H) weater
Solution:
G