What is the consequence of the destruction of CD4⁺ cells by HIV to the human body?
a) The virions and CD4⁺ cell components block the lymph nodes, leading to infection.
b) The virions and CD4⁺cell components block veins and arteries, leading to vascular disease.
c) Oxygen cannot be transported throughout the body from the lungs.
d) It is no longer defended against invading bacteria and viruses, leading to opportunistic infections.
