Which Statement Does Not Describe a Way in Which Oncogenes

Which statement does not describe a way in which oncogenes incorporated into viral genomes can differ from their normal cellular counterparts (proto-oncogenes) ?

A) They can contain fusions to viral sequences, resulting in structural changes that deregulate the protein.
B) They can contain point mutations in regulatory domains, resulting in a loss of protein regulation.
C) They can be present in many tandem copies, as opposed to the single copy present in the cell.
D) They can be expressed from much stronger promoters than the normal cellular promoter.