What is the most logical next event?

A man walks out onto a playing field with a large dalmatian. The man stops and throws the frisbee and returns it to the man. the dog

Pick from: (I) gets trampled by the man in the field.. (II) runs to the man and the man chases it off.. (III) runs up to the man and the ball and the man catches the dog and shakes it off.. (IV) runs around in circles on the field with the frisbee..
(IV)