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: Sponges have specialized cells called collar cells., Fact2: Flagellum of collar cell cause current to pass over collar and food is collected., Question: Which aspect of a sponge's cells allow it to collect food? (A) the cervix (B) teeth (C) flagellum (D) cartilage (E) plasma (F) osculum (G) tissue (H) potassium
[EX A]: C

[EX Q]: 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
[EX A]: A

[EX Q]: Fact1: Lymph is a fluid that leaks out of capillaries into spaces between cells., Fact2: Lymph, a fluid rich in white blood cells, flows through the lymphatic vessels., Question: The a fluid that leaks out of capillaries into spaces between cells is rich in what? (A) White blood cells (B) melanin content (C) melanin amount (D) ribonucleic acid (E) gas spreads in the air (F) holding nutrients (G) transportation (H) precipitation
[EX A]:
A