A 19-year-old client comes to the clinic seeking information about the use of the morning-after pill (levonorgestrel) for emergency contraception.Which of the following statements made by the client indicates a need for further teaching?

"I can use the morning-after pill as a regular form of birth control.”.

"I should take the morning-after pill as soon as possible after unprotected intercourse.”.

"The morning-after pill does not protect against sexually transmitted infections.”.

"The morning-after pill can be less effective if I take it more than 72 hours after unprotected sex.”. . . .