Jeremy is doing a project. He needs pieces of wood that are 4 inches long. The store sells wood only in pieces that are 1 foot long. He decides to buy the pieces that are 1 foot long and cut them. How many pieces of 1-foot-long wood should Jeremy buy if he needs 36 of the 4-inch-long pieces? {1 foot= 12 inches}
A.9
B.12
C.40
D.48