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: Tunicates reproduce sexually., Fact2: Sea squirts are the best known tunicates., Question: what reproduces sexually? (A) orchids (B) mountains (C) viruses (D) humans (E) sea squirts (F) Most plants (G) h2o (H) insects
[EX A]: E

[EX Q]: Fact1: Mutations may change the structure of a chromosome or just change a single nucleotide., Fact2: SNPs involve polymorphisms at the single nucleotide level., Question: What is a potential outcome of genetic mutation? (A) HIV (B) albino (C) anemia (D) pizza eating turtles (E) genealogy (F) SNPs (G) biology (H) death
[EX A]: F

[EX Q]: Fact1: contact between rocks over long periods of time causes rocks to smooth, Fact2: Type of Rocks Salt, quartz and basalt are decent types of aquarium rocks., Question: what needs contact to smooth over long periods of time? (A) oxygen (B) soil (C) an object (D) h2o (E) rivers (F) quartz (G) cartilage (H) bamboo
[EX A]:
F