A 21-Year-Old Man Comes to the Office Due to Nasal

A 21-year-old man comes to the office due to nasal congestion and rhinorrhea.  It occurs intermittently and is often accompanied by sneezing and itchy, watery eyes.  It began 2 years ago and has worsened in severity.  On examination, the nasal turbinates are edematous with clear rhinorrhea.  There is bilateral conjunctival injection.  Which of the following questions would be most helpful during further workup of this patient's condition?

A) "Do you consume soy-based food products?"
B) "Do your symptoms improve when you leave town for vacation?"
C) "Do your symptoms worsen on exposure to cold air?"
D) "Do you use cigarettes or smokeless tobacco?"
E) "Have you been taking any new medications?"