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 Input:
Fact1: poisonous darts are used for defense by sea anemones, Fact2: Protection at the gateway is the best defense., Question: What are used as protection by sea anemones? (A) lamphreys (B) poisonous darts (C) tubular organ (D) feed on dead protists (E) coelenterates (F) islets of Langerhans (G) related organisms (H) moisturize their skin

Ex Output:
B

Ex Input:
Fact1: hydropower requires damming a river, Fact2: Another source of energy is hydropower., Question: What is a source of energy? (A) fossil fuels (B) cooking (C) damming a river (D) sleeping (E) napping (F) Electrical energy (G) our nearest star (H) sunlight

Ex Output:
C

Ex Input:
Fact1: Bottleneck effect occurs when a population suddenly gets much smaller., Fact2: Severe droughts have caused much of the rural population to urbanize., Question: Severe droughts may cause (A) evolution (B) population growth (C) forest is destroyed (D) species variation (E) major threat to health (F) Dehydration (G) the ground shaking (H) a bottleneck effect

Ex Output:
H