instruction:
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").
question:
Fact1: high pressure systems cause clear weather, Fact2: Weather Clear weather usually means good visibility., Question: what does a high pressure system cause? (A) hyperthyroidism (B) lowered energy cost (C) harmful substances (D) Heart rate (E) good visibility (F) It gets heated up (G) Pollution (H) rainfall
answer:
E


question:
Fact1: water causes refraction of light, Fact2: Halos are produced by the refraction of light., Question: What causes halos? (A) germs (B) Pacific (C) solutes (D) water (E) storms (F) glass (G) algae (H) the sun
answer:
D


question:
Fact1: nectar is used for attracting pollinators by plants, Fact2: Nectar is secreted in a shallow nectar cup at the base of flower., Question: What do plants use to attract pollinators? (A) Something made from fermented ricce (B) Something made primarily of oxygen and nitrogen (C) Something that is secreted in a shallow cup. (D) Something that grows into the ground (E) chain called a polynucleotide (F) Something that vaporizes into the air (G) Something that grows on a bush (H) chemical compound NaCl
answer:

C