The ʺIncome Effectʺ in the Market for Aspirin Means That

The ʺincome effectʺ in the market for aspirin means that

A) an increase in the price of aspirin will reduce the total purchasing power of aspirin takers, making them able to afford fewer aspirin.
B) a decrease in the price of a substitute good like acetaminophen will make aspirin takers feel a little poorer than they were before.
C) an increase in the price of aspirin will cause headache sufferers to look for a lower priced remedy.
D) aspirin are generally taken by people with higher than average incomes.