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: Some parasites live on the surface of their host., Fact2: Leeches are external parasites., Question: What unwanted creature would be found on the surface of a human body using it as a host? (A) Tapeworm. (B) Leeches. (C) Pesticides (D) animals (E) insects (F) Hookworm (G) bacteria (H) Bracelet.
[A]: B

[Q]: Fact1: Flowers attract pollinators, and fruits encourage animals to disperse the seeds., Fact2: Most plants are either insect pollinated or wind pollinated., Question: Most plants without attractive flowers use what to disperse pollen? (A) animals (B) wind (C) Energy (D) fronts (E) UV (F) LEDs (G) insects (H) bees
[A]:
B