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: Prokaryotes are single-celled organisms that lack a nucleus., Fact2: Prokaryotes are usually microscopic and bacteria is an example of a prokaryote., Question: What are single celled organisms that do not have a nucleus? (A) Most plants (B) nucleus (C) ferns (D) fossil fuels (E) bushes (F) Eukaryotes (G) leech (H) bacteria
[EX A]: H

[EX Q]: Fact1: Climate is generally described in terms of temperature and moisture., Fact2: Humidity is moisture in the air., Question: Climate is generally described in terms of temperature and what else? (A) Ecology (B) Thermometer (C) calibrated (D) key element (E) Storms (F) Humidity (G) SI units (H) warmer air
[EX A]: F

[EX Q]: 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 A]:
H