Which Line of Evidence Supports the Hypothesis That the Prebiotic

Multiple Choice

Which line of evidence supports the hypothesis that the prebiotic synthesis of molecules could occur in water inclusions within ice on celestial bodies such as Europa, a moon of Jupiter?

A) The internal structure of 3.5-billion-year-old fossilized spheres in Australian rocks
B) The synthesis of prebiotic molecules in a heated solution of gases treated with electrical sparks
C) The presence of frozen mammoths in frozen soil in the Yukon
D) The synthesis of prebiotic molecules in test tubes containing ammonia gas, water vapor, and cyanide (HCN) cooled to -78°C
E) The capacity of RNA to act as a catalyst