The correct is D.
Disappear from a population.
Hope this helps!
Answer: The shrimp population would decrease.
Explanation:
I would say B because A doesn’t have a ring to it.
The researcher could look for the presence of proteins, because viruses have a envelope (capsid) composed of proteins that involve their genetic material. The capsid may have a helical or icosahedral structure and is extremely regular. Viroids cannot synthesize any type of protein, so differentiation is possible.