A company makes necklaces with attached letters. Department A manufactures the necklace chains and letters ahead of demand. Department B assembles the necklaces for specific names when orders are received. Departments A and B are, respectively. a) make-to-stock, make-to-stock. b) make-to-stock, assemble-to-order. c) make-to-order, make-to-stock. d) make-to-order, assemble-to-order.