What is the MOST effective step to decrease your risk of getting an STI when entering a new sexual relationship?

• A. Take antibiotics prophylactically before sexual activity to prevent infections.
• B. Get tested for STIs with your partner and agree to be monogamous.
• C. Get vaccinated against HIV before having sex with your partner.
• D. Choose oral sex instead of vaginal or anal sex with your partner.

Answer: (B)