Write the next sentence in this paragraph:

A man is on an open field with frisbees. He uses the frisbees to train a collie dog. the dog

Options: A). runs around behind the man and eats the frisbees.; B). gets down on all fours and begins frisking all over the field.; C). scratches his ear as he walks.; D). chases, grabs, and does tricks to get the frisbees.;
D).