Why Do People with Colds Often Find Food to Be

Why do people with colds often find food to be more bland and tasteless?

A) Taste buds are easily killed by the cold virus.
B) Taste buds can be blocked by mucous secretions.
C) Our perception of tastes can be altered by a negative mood while we are sick.
D) Our sense of smell, which can be blocked by congested sinuses, is essential for our perception of flavour.