Negative-Sense Single-Stranded RNA Viruses Are Thought to Have Arisen Many

Multiple Choice

Negative-sense single-stranded RNA viruses are thought to have arisen many times independently because

A) the single-stranded RNA viruses are not closely related based on nucleotide sequences.
B) they have diverse capsid morphology.
C) they cause many human diseases including measles, mumps, and rabies.
D) they have only a few genes.
E) there are no known fossils.