The Nurse Is Assessing a Patient Who Has a 35

The nurse is assessing a patient who has a 35 pack-year history of cigarette smoking. In light of this known risk factor for lung cancer, what statement should prompt the nurse to refer the patient for further assessment?

A) Lately, I have this cough that just never seems to go away.
B) I find that I dont have nearly the stamina that I used to.
C) I seem to get nearly every cold and flu that goes around my workplace.
D) I never used to have any allergies, but now I think Im developing allergies to dust and pet hair.