Vince Has a Sinus Infection, Resulting in Nasal Congestion

Vince has a sinus infection, resulting in nasal congestion. He notices that his favorite pizza, from his favorite restaurant, tastes different. In fact, the pizza does not have much flavor at all. The cause is most likely that __________.

A) nasal congestion blocks the olfactory receptor sites
B) flavor relies on your ability to smell
C) flavor requires the ability of saliva to penetrate the mucous in the nasal cavity
D) nasal congestion thickens the saliva, resulting in an inability to transport chemical stimuli