Astronomers have detected the presence of various chemicals in deep space similar to those thought to have been synthesized in Earth's early atmosphere. The environments where those deep space molecules originated would be most likely to contain ________
A) low oxygen, ultraviolet light, methane, nitrogen, and hydrogen
B) abundant oxygen, no ultraviolet light, methane, nitrogen, and hydrogen
C) oxygen, no ultraviolet light, and carbon monoxide
D) abundant oxygen, ultraviolet light, methane, nitrogen, and hydrogen
Answer: A
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