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: the Himalayas were formed by rock folding, Fact2: If the rocks are not as brittle, they will either tilt or fold., Question: What is the consistency of the Himalayan rocks? (A) crust (B) Loose (C) simple (D) cold (E) loose soil (F) Smooth (G) liquid (H) Brittle

Ex Output:
H

Ex Input:
Fact1: Male dogs use pheromones in urine to mark their territory., Fact2: Pheromones are natural aphrodisiacs., Question: What do male dogs use in urine to mark their territory? (A) Natural aphrodisiacs (B) competing for resources (C) Tails (D) Urine cleaner (E) Something coming from a gland (F) Chemical energy (G) an area swollen with pus (H) Chew toys

Ex Output:
A

Ex Input:
Fact1: adding salt to a liquid decreases the melting point of that liquid, Fact2: Salt particles come from the ocean as the spray of waves evaporates, leaving salt particles suspended in the air., Question: What can be added to a liquid to decrease the melting point of the liquid? (A) kinetic energy (B) energy of moving objects (C) Sulfur dioxide (D) fossil fuels (E) Chemical energy (F) activation energy (G) aqueous solution (H) Something from an ocean

Ex Output:
H