The Protein-First Hypothesis

The protein-first hypothesis

A) is supported by the discovery that RNA can act as a catalyst.
B) is supported by the fact that RNA can act as a substrate and as an enzyme.
C) suggests it was an "RNA world" about 4 billion years ago.
D) suggests that only RNA was needed to progress to the formation of the first cells.
E) suggests that sophisticated enzymes with the ability to synthesize DNA and RNA arose first from small molecules provided by the ocean.