Tsunami Waves Nearing the Open Coast

Multiple Choice

Tsunami waves nearing the open coast:

A) slow down because they don't want to hit the coast too fast.
B) speed up because they finally begin to feel bottom.
C) slow down because they drag more on the shallower bottom than in the deep ocean.
D) speed up because the shallower water forces the leading edge to squirt out ahead.
E) speed up because the wave launches forward as it breaks.