Food Generally Tastes Bland When You Have a Severe Head

Food generally tastes bland when you have a severe head cold because

A) your cold will cause the sweet receptors in your mouth to become inactivated.
B) your high temperature will cause your brain to block signals from the taste buds in the mouth.
C) because your naturally produced antibodies interfere with chemical molecules stimulated by your taste buds.
D) flavour is influenced by smell as well as taste, and with a reduced sense of smell your sense of taste will be diminished.