Which of the Following Is Good Advice About Condom Use

Which of the following is good advice about condom use in a monogamous relationship?

A) Use condoms until you have established a routine on oral contraceptives.
B) Use condoms until you have gotten to know your partner's history and have determined that he or she was not at high risk for a sexually transmitted infection.
C) Use condoms throughout the relationship.
D) Use condoms until you both have been tested for sexually transmitted infections and have determined that you both are STI-free and monogamous.