Thanks for posting your query.
"35-year-old man who smokes two packs of cigarettes daily" appears to be at high risk for respiratory complications as lungs are already compromised due to smoking.
Option "A" & "B" may also be at high risk in long run.
Persistent diabetes and Hypertension may cause renal shutdown by chronic kidney disease
and may manifest in form of respiratory distress
Hypertension may also cause effect on heart and lungs and may cause respiratory distress.
Chronic allergic rhinitis
by involving lower respiratory tract
may cause respiratory problems.
Hope that helps.
Dr. Mayank Bhargava