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: acid rain has a negative impact on water quality, Fact2: Sulfur dioxide causes acid rain., Question: What has a negative impact on water quality? (A) Reverse osmosis (B) fossil fuels (C) Fresh water (D) Carbon filter (E) chlorofluorocarbons (F) Sulfur dioxide (G) Pollution (H) harmful substances

Ex Output:
F


Ex Input:
Fact1: Mammals can also generate little bursts of heat by shivering., Fact2: Polar bears are mammals., Question: What can generate little bursts of heat by shivering? (A) alpacas (B) bacteria (C) animals (D) polar bears (E) phytoplankton (F) rabbit (G) viruses (H) humans

Ex Output:
D


Ex Input:
Fact1: conserving water can be used for survival in a dry environment, Fact2: Also, camels conserve their water., Question: what do camels hoard to survive? (A) air (B) food (C) cells (D) protein (E) seeds (F) warmth (G) fat (H) water

Ex Output:

H