A store selling school supplies advertises a bundle deal. The consumer can pick a backpack, a binder, a pack of pencils, and notebook paper for a set price. There are 5 types of backpacks, 5 types of binders, 3 types of pencils, and 2 types of notebook paper. How many different bundles are possible?
A.) 150
B.) 25
C.) 15
D.) 140