Answer:
A. Having sexual intercourse without a condom
Step-by-step explanation:
HIV can be transmitted only through the contact of damaged tissue or mocous membranes with body fluids like blood, semen, pre-seminal fluid, rectal fluids, vaginal fluids, and breast milk. As you can see in the image I added, the other options are not possible.
I hope you find this information useful and interesting! Good luck!