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").

Fact1: skin is used for protecting the body from harmful substances, Fact2: Skin is the body's largest organ., Question: What can protect the body from harmful substances? (A) the body's largest organ (B) layers of fat (C) Electric devices (D) bones (E) sunburns (F) hard outer covering (G) deoxyribonucleic acid (H) muscle
A

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
E

Fact1: Caecilians can be found in moist soil near rivers and streams in tropical regions., Fact2: Cobra bobo is the local name for caecilian., Question: what can be found in moist soil near rivers and steams in tropical regions? (A) ferns (B) insects (C) humans (D) cobra bobo (E) storing water (F) weathering (G) animals (H) clouds

D