Which of the following observations would have led scientists to conclude that woodpeckers DO have shock-absorbing skulls?
(A) The woodpecker’s head slowing down just before hitting the tree.
(B) The space between the bird’s skull and beak compressing upon impact.
(C) The bird’s beak bouncing back quickly after hitting the tree.
(D) The woodpecker’s whole head moving stiffly in a single unit, like a hammer.