You manage a large hotel's on-premises laundry. One of the laundry-room workers, whose job it is to remove laundry from laundry carts and sort it, comes to you with a complainthis back is hurting from constantly bending over to reach down into the bottom of the carts to retrieve the laundry. He says that other workers are experiencing similar problems with the carts, which are simple canvas laundry carts from three to four feet deep. Which of the following actions is the best solution to this problem?