Write the next sentence in this paragraph:

A young boy pulls on a metal lever protruding from a metal bucket with a washboard in it. two young girls

[A]. behind him demonstrate a tugging technique in a kitchen..
[B]. slide down the slide backwards until the tips of their legs contact the floor..
[C]. get out of their seats and walk over inside a large circle..
[D]. watch as a woman in a white apron demonstrates to the boy and girl how to turn the lever and also hangs clothes on a clothes line..
[D].