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: tidal energy can be used to produce electricity, Fact2: Tidal energy is renewable ., Question: What can renewable energy be used for? (A) Creating more fossil fuels (B) health (C) Quality of life (D) Measuring water (E) Global warming (F) root growth (G) Electricty (H) staying warm
[EX A]: G

[EX Q]: Fact1: Bone provides protection for soft tissues and internal organs., Fact2: Antlers are true bones and are composed of calcium and phosphorous., Question: What provides protection for soft tissues and internal organs? (A) bacteria (B) Veins and arteries. (C) Fully cooking the oysters (D) layers of fat (E) calcium and phosphorous (F) water (G) peachleaf willow (H) the trachea
[EX A]: E

[EX Q]: Fact1: a cactus stem is used for storing water, Fact2: Saguaro cactus grow very slowly., Question: What is stored in the stem of the saguaro? (A) gas (B) water (C) ice (D) sand (E) fibrous (F) sugar (G) glucose (H) energy
[EX A]:
B