You Are Working on Tissue Samples with a Colleague and Discover

You are working on tissue samples with a colleague and discover a new kind of virus.Based on the morphological features observed,your colleague says "This is clearly very similar to the common ancestor of all other viruses." You disagree because

A) viruses have probably arisen more than once and do not have a common ancestor.
B) viruses have arisen once and their common ancestor has not be discovered.
C) it is not possible to visualize viruses in the laboratory.
D) DNA studies would be needed to confirm this.
E) viral features are too variable to make such a comparison.