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").

[Q]: Fact1: when a metal rusts , that metal becomes orange on the surface, Fact2: Cast-iron and steel surfaces are susceptible to corrosion in the form of rust., Question: Cast-iron and steel surfaces are susceptible to becoming what on the surface? (A) hardness (B) solid (C) irritants (D) acids (E) orange (F) heat (G) Unsafe (H) damaging
[A]: E


[Q]: Fact1: melting is when solids are heated above their melting point, Fact2: Ice cubes melt in liquid water., Question: What, when heated, turns into liquid water? (A) gasoline (B) oil (C) a solute (D) fire (E) ice cubes (F) a prism (G) mussels (H) Energy.
[A]: E


[Q]: Fact1: if gas is heated then that gas will expand, Fact2: Cottages are heated by gas space heat or gas furnaces., Question: gas does what after going through a furnace into a cottage (A) expands (B) becomes toxic (C) has odor (D) warmth (E) Rise (F) moves (G) burning (H) compresses
[A]:
A