Answer:
The correct option is D:
"The person will not be able to adequately fight viral infections and infections caused by intracellular bacteria."
Step-by-step explanation:
Cytotoxic T lymphocytes have an important role to play in the immune system, they belong to the category of cells that have the ability to kill off another cell. Cytotoxic T lymphocytes guards the host cell against attack of viruses and, in addition, also defends against possible (bacterial) infections that can be caused by harmful pathogens that multiply inside the cells of the host.
Hope that answers the question, have a great day!