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: 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
C

Fact1: extreme heat and pressure change rock into metamorphic rock, Fact2: Slate is a metamorphic rock., Question: What rock is formed by extreme heat and pressure (A) erosion (B) crust (C) calcite (D) Slate (E) dead (F) forces (G) fibrous (H) complex
D

Fact1: water vapor condensing in clouds causes rain, Fact2: If it's raining AND barometer is steady, then predict rain., Question: How can water vapor be detected? (A) Thermometer (B) radiography (C) A computer (D) satellites (E) Barometer (F) Evaporation (G) Windmills (H) Solar panels
E