A nurse in the emergency department is caring for a client who is concerned about an unplanned pregnancy after having unprotected intercourse with a casual acquaintance last evening. Which of the following statements by the nurse regarding emergency contraception is correct?

"Emergency contraception will protect you from any possible exposure to STIs"

"Emergency contraception is 100% effective"

"You are a candidate for emergency contraception since it has been less than 120 hours since intercourse occurred"

"If a pregnancy has been established, emergency contraception will terminate the pregnancy"