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: a flashlight requires a source of electricity to produce light, Fact2: Lanterns and flashlights are sources of light used for camping., Question: What does a lantern use a source of electricity for? (A) heat energy (B) staying warm (C) enclose light (D) produce light (E) absorb heat (F) reflect light (G) to move people (H) protect them
Example Output: D

Example Input: Fact1: Male dogs use pheromones in urine to mark their territory., Fact2: During Urination Dog's urine is used as a scent marker for other dogs., Question: How do male dogs mark their territory? (A) Chemical energy (B) Hot dog eating contest (C) Adequate signage (D) with their fur (E) Scent marker (F) heat produced (G) mate with females (H) Paint
Example Output: E

Example Input: Fact1: better senses have a positive impact on an animal 's survival, Fact2: Dolphins have an additional sense called echolocation., Question: What has a positive impact on an animal's survival? (A) human hunting (B) echolocation (C) peachleaf willow (D) a lack of human aid (E) four limbs (F) a band aid (G) sensory neurons (H) genetic diversity
Example Output:
B