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: Male dogs use pheromones in urine to mark their territory., Fact2: Pheromones are natural aphrodisiacs., Question: What do male dogs use in urine to mark their territory? (A) Natural aphrodisiacs (B) competing for resources (C) Tails (D) Urine  cleaner (E) Something coming from a gland (F) Chemical energy (G) an area swollen with pus (H) Chew toys

A: A
****
Q: Fact1: All plants have a characteristic life cycle that includes alternation of generations., Fact2: Plants have chlorophyll and an alternation of generations ., Question: What have chlorophyll and a characteristic life cycle? (A) vases (B) Fungi (C) models (D) Trees (E) Conifers (F) plants (G) seeds (H) greenhouses

A: F
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Q: Fact1: dew is formed when water vapor condenses over night, Fact2: If there is a greater dew point there is more water vapor., Question: More condensing water means more of what? (A) CO 2 (B) rain (C) hurricanes (D) contraction (E) heat (F) dew (G) expansion (H) gas

A:
F
****