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 Q]: Fact1: a black hole is formed by a high-mass star collapses, Fact2: Black Holes Black holes are the inevitable conclusion of Einstein's General Theory of Relativity., Question: When do stars fulfill the inevitable conclusion of Einstein's General Theory of Relativity? (A) inactive (B) Winter (C) an object (D) observe it (E) collapse (F) light (G) our star (H) ligt
[EX A]: E

[EX 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
[EX A]: E

[EX Q]: Fact1: Evaporation of sweat uses energy, and the energy comes from body heat., Fact2: Heat When exercising, the body creates excess heat., Question: Evaporation of sweat uses energy, where does the energy come from? (A) vapors (B) temperature (C) expelled (D) environment (E) hydration (F) water vapor (G) The Sun (H) exercise
[EX A]:
H