Unlike an increase in the "quantity demanded" of a good, an increase in demand for a good
A)can be caused by a reduction in the price of an input used to produce the good.
B)can be caused by a decline in the "own price" of that good.
C)can be caused by an increase or decrease in the incomes of customers.
D)can be caused by a change in the price of a substitute for the good.
E)both c. and d.