More than 90 percent of those who have hiv get it from:
animal bites and drug use
blood transfusions
living with a person who is infected with hiv
sexual activity or drug use

More than 90 percent of those who have HIV get it from sexual activity or drug use. Using drugs might be contaminated by HIV virus because there are drugs who use injections. These syringe will be passed from one person to another which shares the same needle that can be a reason of transmitting the virus. Sexual activity is the most common and happens when the person you are interacting has HIV, then you will get it from that contaminated person.

The correct answer is "grounded".