One Hypothesis of Viral Origin Suggests That Viruses Began as Parasitic

Multiple Choice

One hypothesis of viral origin suggests that viruses began as parasitic prokaryotes that gradually lost most of their genetic information and ultimately became completely dependent on host cells. This hypothesis is called:

A) the regressive hypothesis.
B) the escaped gene hypothesis.
C) the coevolved hypothesis.
D) the transposon hypothesis.
E) the parasitic hypothesis.