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").

Example Input: Fact1: cooking food requires adding heat energy, Fact2: Heat is essentially the source of energy., Question: Doing what to food requires adding the source of energy? (A) burning (B) burying (C) degrading (D) hydration (E) boiling (F) Light (G) sharing (H) cooking
Example Output: H

Example Input: Fact1: global warming is when worldwide temperature increases, Fact2: Mass extinction occurs in the ice age and global warming periods., Question: When worldwide temperature increases, mass what occurs? (A) extinction (B) deforestation (C) carbon (D) ice age (E) living (F) movement (G) It decreases (H) Pollution
Example Output: A

Example Input: Fact1: an electron microscope is used for seeing very small objects by making them appear bigger, Fact2: Bacteria are very small., Question: What can be used to see bacteria by making them appear bigger? (A) an image (B) telescope (C) tiny polyps (D) dogs (E) photons (F) Light (G) magnifying glass (H) microscope
Example Output:
H