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: Mammals have a layer of fat under the skin to help insulate the body., Fact2: Glass insulation keeps beverage warm for hours., Question: What keeps mammals warm? (A) evaporation (B) Animal fur (C) staying warm (D) sweating (E) They have thick fur (F) with their fur (G) a layer of fat (H) Veins and arteries.

A: G
****
Q: 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

A: H
****
Q: Fact1: hydropower requires damming a river, Fact2: Scientists agree that dams devastate rivers., Question: Hydropower can devastate a what? (A) salmon (B) rocks (C) air (D) plants (E) soils (F) homes (G) river (H) habitat

A:
G
****