A firm will work with a customer to design the product, and then make it from purchased materials, parts, and components. This firm is called $\_\_\_\_\_\_\_\_\_\_\_\_\_$blank

Multiple Choice

an assemble to order firm.

a customer service firm.

a make$-$to$-$order firm.

an engineer$-$to$-$order firm.

a make$-$to$-$stock firm.