One symptom of the common cold is loss of appetite. Why does this occur?a) When you have a cold, loss of olfaction also leads to loss of gustatory sensitivity; bland food will be less appealing.b) A loss of appetite is one way in which the body conserves energy to fight the infection, rather than using energy to chew and digest food.c) When you have a cold, nasal congestion reduces the sensitivity of olfaction, which makes food less appealing.d) All of the choices are correct.

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