Which of the following statements by a patient indicates a need for teaching about contraception? a. “Depo-Provera is not effective against sexually transmitted infections, but contraceptive protection is immediate if I get the injection on the first day of my period.” b. “The hormonal ring contraceptive, NuvaRing, protects against pregnancy by suppressing ovulation, thickening cervical mucus, and preventing the fertilized egg from implanting in the uterus.” c. “Abstinence may be an effective me