Which of the following statements regarding viral fusion mechanisms is true?
a) Only RNA viruses use fusion mechanisms to enter host cells
b) All enveloped viruses use the same mechanism for fusion with host cells
c) Viral fusion occurs primarily in the cytoplasm of the host cell
d) Viral fusion is a passive process that occurs when a virus is taken up by a host cell
e) Fusion peptides are commonly found in the viral membrane and help to mediate membrane fusion