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: if soil is permeable then water easily flows through that soil, Fact2: Sandy soils are permeable., Question: Water easily flows through what? (A) streams. (B) streams (C) coral reefs (D) sandy soils (E) aqueous solution (F) swamp vegetation (G) calcite (H) Sediment
Example Output: D

Example Input: Fact1: heat can change the state of matter, Fact2: Matter exists in a solid, liquid or gas state and can change forms., Question: _ can change liquid to gas. (A) magnetism (B) cycles (C) energy (D) vapors (E) condensation (F) gravity (G) thirst (H) Heat
Example Output: H

Example Input: Fact1: Viruses are so small that they can be seen only with an electron microscope., Fact2: Where most viruses are DNA, HIV is an RNA virus., Question: what is so small it can only be seen with an electron microscope? (A) clouds (B) cell (C) DNA (D) ovum (E) HIV (F) magnified (G) h2o (H) RNA
Example Output:
E