The correct option is D complete abstainment from coitus
Transmission of sexually transmitted diseases like syphilis can be prevented by complete abstainment from coitus.
Syphilis is a bacterial infection usually spread by sexual contact that starts as a painless sore. The causal organism of this STD (sexually transmitted disease) is Treponema pallidum. The best way to prevent syphilis is to practice safe sex, so that is does not spread from one person to another.