A Virus Is Isolated Independently from Two Infected Individuals

A virus is isolated independently from two infected individuals. Each individual shows similar symptoms. Under an electron microscope, both viruses share common morphological features. Based on this information, what would you predict in relation to their respective nucleotide sequences?

A) The two viruses are clearly of the same species, therefore they would have identical genomes.
B) They may be the same, slightly different or substantially different. The high rate of mutation in viruses makes large genome differences common.
C) Quite different, as shared symptoms and morphology do not necessarily correlate to nucleotide conservation.
D) As many viruses do not have DNA, nucleotide differences or similarities are irrelevant.
E) They would be the same, or may differ slightly.

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