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: knowledge of the stars can be used to navigate, Fact2: Of course, astronomers also study stars., Question: What can be used to navigate? (A) music (B) backbones (C) astrology (D) cilia (E) magic (F) sponges (G) astronomy (H) lamphreys
G

Fact1: Ejaculation occurs when muscle contractions propel sperm from the epididymes., Fact2: Male gametes are called sperm., Question: What is it called when male gametes are propelled because of muscle contractions? (A) competition (B) rapid expansion (C) intercourse (D) thrusting (E) a wave (F) reproductions (G) A Greek letter (H) ejaculation
H

Fact1: an electric stove transforms electrical energy to heat energy, Fact2: Electricity or electrical energy, is produced at a power plant., Question: What transforms electricity into heat? (A) peachleaf willow (B) the Moon (C) a gas oven (D) an ice cube (E) an electric stove (F) an engine (G) Firecrackers (H) chemical messengers

E