Some viruses cause the host cell to reproduce both itself and the virus.

Groups of these cells become
a. polio.
b. tumors.
c. mumps.
d. rabies.

Mumps

b. tumors

The correct answer is b. tumors. Some viruses have the ability to manipulate the host cell's normal mechanisms to reproduce themselves. As a result, these infected cells multiply and form clusters, leading to the formation of tumors.

To arrive at this answer, you can deduce it based on your knowledge of viruses and their effects on host cells. Additionally, you can also eliminate the other options by considering their respective characteristics.

For example, polio is a viral infection that mainly affects the nervous system, causing paralysis in some cases. However, it does not directly cause cells to reproduce and form clusters. Mumps is a viral infection that primarily affects the salivary glands and can cause swelling around the jaw. While it may lead to inflammation and swelling, it does not directly cause cells to reproduce and form clusters. Rabies is a viral infection that affects the central nervous system, but it does not cause cells to reproduce and form clusters either.