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: Hydrogen bonds cause water to expand when it freezes., Fact2: Deuterium, or heavy hydrogen, is an isotope of hydrogen, or a hydrogen atom with a neutron added., Question: The bonds of that which when heavy is Deuterium cause what to expand when it freezes? (A) matter (B) rings (C) CO 2 (D) liquids (E) gas (F) solutes (G) cations (H) water
H

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: Monotremes are mammals that reproduce by laying eggs., Fact2: Like the platypus, an echidna is an egg laying mammal., Question: A platypus is an example of  (A) a reptile (B) animals (C) an amphibian (D) a monotreme (E) killing insects (F) insects (G) murmur (H) an arachnid

D