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: Most pituitary hormones control other endocrine glands., Fact2: An abnormal endocrine gland is often blamed for producing obesity., Question: pituitary hormones can be blamed for what? (A) a lot of human deaths (B) Plant growth is reduced (C) harmful substances (D) Dehydration (E) matter vibrating (F) producing obesity (G) major threat to health (H) Leptospirosis
[EX A]: F

[EX Q]: Fact1: recycling has a positive impact on the environment, Fact2: Steel is a recycled and recyclable product., Question: What has a positive impact on the environment? (A) animals (B) bushes (C) energy (D) peachleaf willow (E) oysters (F) using steel (G) Solar energy (H) Green beans
[EX A]: F

[EX Q]: Fact1: Many corals secrete an exoskeleton that builds up to become a coral reef., Fact2: Corals, and invertebrates in general, are delicate creatures., Question: What can secrete an exoskeleton that builds up to become a reef? (A) graptolites (B) some invertebrates (C) remains of prehistoric life (D) humans (E) insects (F) gastropod shells (G) barnacles (H) all invertebrates
[EX A]:
B