In the Bacteriophage $\phi$ X174,which of the Following Events Occurs at the Same Time

In the bacteriophage $\phi$ X174,which of the following events occurs at the same time as the ssDNA is packaged into the procapsid?

A) Proteolytic maturation of the capsid proteins.
B) Removal of the external scaffolding protein D.
C) Removal of the internal scaffolding protein B.
D) Addition of the spike proteins to the capsid.
E) Synthesis of the second DNA strand.