Which Feature Is an Advantage That Viruses (And Phages) Have

Which feature is an advantage that viruses (and phages) have over plasmids, with respect to their ability to be vectors?

A) Unlike plasmids, viruses have origins of replication.
B) Viruses can carry more exogenous DNA than plasmids.
C) Unlike plasmids, viruses usually carry selective markers.
D) Unlike plasmids, viral DNA usually contains one or more restriction sites.
E) Viruses are easier to manipulate than plasmids.