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: Flagella help prokaryotes move., Fact2: Most prokaryotes are unicellular., Question: What helps unicellular organisms move? (A) evaporation (B) bacteria (C) heat energy (D) glucose (E) sweating (F) flagella (G) legs (H) blood
[EX A]: F

[EX Q]: Fact1: a mold spore has a negative impact on the respiratory system, Fact2: Insects also have both a heart and a respiratory, or breathing, system., Question: Mold spores have what impact on breathing? (A) neutral (B) ambiguous (C) symptoms (D) motility (E) positive (F) dangerous (G) negative (H) uncontrolled
[EX A]: G

[EX Q]: Fact1: Running water is better able to dissolve oxygen and nutrients than standing water., Fact2: Water is made up of H2O molecules., Question: what is better able to dissolve oxygen and nutrients when it's running over standing? (A) bass (B) lake (C) H20 (D) h2o (E) heat (F) vitamins (G) hydrogen (H) bogs
[EX A]:
D