Which of the following is a method to prevent the transmission of AIDS?

Sexual abstinence is the most effective method to prevent the transmission of AIDS. By choosing not to engage in sexual activity, an individual eliminates the risk of exposure to the HIV virus, which is primarily spread through sexual contact. This practice is straightforward and is a complete barrier against the transmission of sexually transmitted infections, including HIV.

The other options may not provide the same level of effectiveness in preventing AIDS. For example, while spermicide can reduce the risk of some sexually transmitted infections, it is not specifically designed to prevent HIV transmission and may not be effective on its own. Prophylactic antibiotics are typically used to prevent bacterial infections and not effective for viral transmission, such as HIV. Abstaining from dating may reduce opportunities for exposure, but it does not completely remove the risk of transmission if a person were to engage in sexual activity at any point.