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").

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
E

Fact1: carpooling decreases the amount of cars used to travel to a place, Fact2: Carpooling cuts down on congestion and pollution., Question: What decreases when we decrease the amount of cars traveling to one place? (A) Temperature (B) Heart rate (C) Climate change (D) Pollution (E) Clean air (F) forces (G) Burning fossil fuels (H) gene flow
D

Fact1: a breathing mask is used for keeping harmful particles from entering the respiratory system, Fact2: Allergies are a reaction of the immune system to harmful particles in the air., Question: What can prevent an allergic reaction? (A) chemical messengers (B) prolactin release (C) with their fur (D) sweating (E) Breathing mask (F) deoxyribonucleic acid (G) Cooking (H) hormones

E