Answer:
The correct answer is b. reduced lymphocyte levels
Step-by-step explanation:
Human immunodeficiency virus is responsible for causing a deadly disease called AIDS. This virus attacks our immune cells and weakens our immunity. T helper cells which are also known as CD4 cells are the main target of HIV.
It attacks T helper lymphocytes and get inside the Tcell. Then it gets incorporated into the DNA of CD4 cell and replicate itself and makes more copied of itself. Then it gets released from that cell and infects more T lymphocytes.
So in this way, it destroys T helper lymphocytes and reduces our immunity. So the correct answer is b.