A Factory Produces Vacuum Cleaners and Floor Polishers

A factory produces vacuum cleaners and floor polishers. The factory adopts a new technology that allows it to use fewer resources to build floor polishers. With this new technology, the opportunity cost of producing a vacuum cleaner ________ and the factory is ________ efficient.

A) remains the same; less
B) equals the opportunity cost of producing a floor polisher; more
C) increases; equally
D) decreases; more
E) increases; more