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: Migrants typically travel long distances., Fact2: Migrant birds arrive., Question: What travels long distances? (A) humans (B) jets (C) rocks (D) birds (E) camels (F) cocoons (G) Light (H) eggs

Ex Output:
D


Ex Input:
Fact1: Organisms cluster around hydrothermal vents in the ocean floor., Fact2: Background Hot water vents form inside cracks in the ocean floor., Question: Organisms cluster around hot water inside cracks where? (A) loose soil (B) ocean floor (C) food and shelter (D) tectonic plates (E) the ground (F) allow growth (G) Absorb light (H) survive

Ex Output:
B


Ex Input:
Fact1: a thermal insulator slows the transfer of heat, Fact2: Ice is a good thermal insulator., Question: What is ice good at? (A) Physical weathering (B) Conducting electricity (C) heat production (D) water conservation (E) Slowing the transfer of ions (F) lowered energy cost (G) Slowing the transfer of heat (H) Heating up water

Ex Output:

G