In Which Statement(s) Is "Demand" Used Correctly? (I) "An Increase

Multiple Choice

In which statement(s) is "demand" used correctly? (I) "An increase in the price of hamburgers will reduce the demand for hamburgers."
(II) "An increase in the price of hamburgers will reduce the demand for hamburger buns."

A) in both statements I and II
B) in statement I only
C) in statement II only
D) in neither statements I nor II