Your Allergies Are Bad This Summer So Your Allergist Writes

Multiple Choice

Your allergies are bad this summer so your allergist writes you a prescription to relieve your symptoms. When you get to the pharmacy, you notice the name brand allergy medicine is more expensive than its generic equivalent. You purchase the generic equivalent and demonstrate all of the following EXCEPT

A) the principle of substitution of one product for another.
B) the principle of diminishing marginal utility.
C) when price decreases, the quantity demanded increases.
D) a price change may affect consumer optimum.