In the concluding paragraph below, what sentence best restates the thesis?
Thesis: Tail-wagging in dogs is actually a sophisticated method of
communicating emotional responses.

1. It seems then that there is some credibility to the study on tail-wagging in
dogs.

II. There does seem to be evidence for a correlation between canine emotions
and the direction of the tail wag.

III. The tail-wagging method is highly effective in communicating emotional
responses to different stimuli.

IV. This knowledge should help dog owners to better understand and interact
with their dogs.