Which Statement by a Client Taking Oral Contraceptives Requires Immediate

Which statement by a client taking oral contraceptives requires immediate intervention by the nurse?

A) "I forgot to take my pill twice last month, and I haven't started my period yet."
B) "I don't take those last seven pills at the end of my pill pack."
C) "I am only drinking one cup of coffee a day since I started taking birth control pills."
D) "I have started attending a smoking-cessation program."