The mechanisms or possibilities, according to which further advancement of life was achieved when the protobionts acquired the informational macromolecules the DNA, include:

A. The adenylic acid, and perhaps other mononucleotides, pclymerize simultaneously with the amino acid residues

B. The amino acid condensation product, under appropriate circumstances, has oxygenase enzymatic activity

C. A thermal protenoid in situ has ligase activity

D. All of the above

Answer: Option A