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").

Ex Input:
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

Ex Output:
C

Ex Input:
Fact1: soil erosion means soil loss through wind, Fact2: Soil erosion is one of the leading causes of water pollution in the United States., Question: What is one consequence of soil loss? (A) Decrease bodily water (B) humans disturb it (C) drying out (D) flooding (E) contamination (F) deforestation (G) chemical changes (H) Water pollution

Ex Output:
H

Ex Input:
Fact1: breathing is when a gill converts from oxygen in water into oxygen in blood, Fact2: Shark gills remove the oxygen from the water., Question: What breathing use gills to convert oxygen in blood? (A) sharks (B) octopus (C) hippos (D) a fish (E) Lobsters (F) water bugs (G) trout (H) alligators

Ex Output:
A