【单选题】

According to the model presented in the passage, which of the following normally determines the initial height of a tsunami
A．(A) The speed of the crustal plates that slip along each other in the imaginary fault plane

B．(B) The vertical motion of the sea floor where the tsunami generates
C．(C) The orientation of the assumed fault plane
D．(D) The degree of refraction and shoaling
E．(E) The presence of bumps and grooves on the seafloor