Oparin at Moscow University, Miller and Urey at the University of Chicago, and Juan Oró at the University of Houston performed experiments throughout the twentieth century to prove that

A) organic macromolecules can arise from abiotic conditions.
B) micelle formation generated the first membranes.
C) RNA was the catalytic molecule of early Earth.
D) TCA cycle generates amino acids.
E) iron band formations were caused by photoferrotrophy.