The a Protein of the Phage $\phi$ X174 Is Required for Which of the Following Processes?
A)Synthesis

The A protein of the phage $\phi$ X174 is required for which of the following processes?

A) Synthesis of the double-stranded replicative form DNA.
B) Packaging of the viral protein into the newly formed capsids.
C) Assembly of the viral capsid.
D) Synthesis of the plus-strand DNA via rolling circle replication.
E) Entry of the viral DNA into the host cell.