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: if gas is heated then that gas will expand, Fact2: An increase in temperature causes a gas to expand., Question: what affects a gas? (A) electricity (B) kinetic energy (C) temperature (D) Evaporation (E) salinity (F) Pollution (G) wind (H) magnetism

Ex Output:
C

Ex Input:
Fact1: Mammals have a layer of fat under the skin to help insulate the body., Fact2: Glass insulation keeps beverage warm for hours., Question: What keeps mammals warm? (A) evaporation (B) Animal fur (C) staying warm (D) sweating (E) They have thick fur (F) with their fur (G) a layer of fat (H) Veins and arteries.

Ex Output:
G

Ex Input:
Fact1: if soil is permeable then water easily flows through that soil, Fact2: Gourdin soils have slow permeability., Question: What does water easily flow through? (A) calcite (B) streams (C) gourdin (D) Sediment (E) cactuses (F) watershed (G) streams. (H) crust

Ex Output:
C