You Are a Physician and One of Your Patients Comes

You are a physician and one of your patients comes in and tells you she has a cold and has lost her sense of smell.You explain that she has lost her sense of smell because

A) cold viruses directly damage the microvilli on the dendrites of olfactory receptor neurons.
B) cold viruses interfere with the processing of olfactory information in the olfactory bulb of the nasal cavity.
C) the amount of mucus in her nose has increased, making it difficult for odorant molecules to diffuse through the protective mucus layer to reach olfactory receptors.
D) her vomeronasal organ has been damaged.
E) the olfactory bulb is swollen, making it impossible for olfactory information to reach the brain.