Why Was the Number of Heterotrophs on Primitive Earth Likely

Multiple Choice

Why was the number of heterotrophs on primitive Earth likely to have initially been severely restricted?

A) The spontaneous production of organic molecules occurs very slowly.
B) The spontaneous production of organic molecules occurs very quickly.
C) The early heterotrophs could not reproduce.
D) The early heterotrophs reproduced too quickly.
E) Organic molecules spontaneously broke down keeping their amounts low.