instruction:
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").
question:
Fact1: planting trees has a positive impact on an ecosystem, Fact2: An ecosystem contains many habitats., Question: doing what with trees has a positive impact on habitats (A) making tables (B) chopping down (C) planting (D) watershed (E) earth (F) bloom time (G) growth (H) timbering
answer:
C


question:
Fact1: smell is used for finding food by some animals, Fact2: Olfaction is the sense of smell., Question: What do some animals use to find food? (A) Echinoids (B) breakfast (C) time travel (D) Energy (E) streams. (F) heat energy (G) nature (H) olfaction
answer:
H


question:
Fact1: cutting down trees has a negative impact on an ecosystem, Fact2: When ecosystems are healthy, humankind is healthy., Question: cutting down trees has a negative impact on the health of what? (A) space (B) humankind (C) mars (D) aliens (E) salmon (F) Species (G) humans (H) plants
answer:

B