Which sentence correctly uses parallel verb phrases? A. An electronic maid had cooked dinner, had cleaned the dishesand then was put away for the night by the house's owner.

B. The dust was swept up by the electronic vacuum, and the floors were cleaned by an automated mop.

C. The garage door has opened automatically , and the car is driven away by a robat chauffeur

D. Tiny lawnmowers have been circling the lawn and each blade of grass is carefully clipped