The Primary Capsid Protein of the Phycodnavirus PBCV-1, Vp54, Is

The primary capsid protein of the phycodnavirus PBCV-1, Vp54, is glycosylated.Which of the following describes how the viral protein is thought to acquire its sugar residues?

A) The sugars are added to the protein inside the lumen of the rough ER.
B) Cellular enzymes in the cytoplasm add the sugars to the capsid protein.
C) Viral enzymes add the sugars directly to the capsid protein.
D) The sugars are added to the protein in the Golgi of the host cell.
E) The sugars are added by viral enzymes after release of the virion from the host cell.