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: Many consumers feed at more than one trophic level., Fact2: Consumers are heterotrophs that feed on tissues of other organisms., Question: What may eat other organisms at more than one trophic level? (A) barnacles (B) chickens (C) fur seals (D) humans (E) heterotrophs (F) mammals (G) animals (H) rabbit

Ex Output:
E

Ex Input:
Fact1: darkness has a negative impact on photosynthesis, Fact2: Light is necessary for photosynthesis, a process that produces oxygen., Question: Darkness has a negative impact on which process of a plant? (A) slow and inefficient (B) chemical changes (C) circulatory systems (D) most organisms (E) fossil fuels (F) Abnormal cell growth (G) deoxyribonucleic acid (H) Oxygen production

Ex Output:
H

Ex Input:
Fact1: bacteria can cause people to become ill, Fact2: People frequently die of illnesses ., Question: What can cause people to die? (A) viruses (B) Dehydration (C) stars (D) smallpox (E) bacteria (F) clouds (G) flooding (H) Saturn

Ex Output:
E