11. As a tsunami approaches shallow water, which of the following set of transformations occur?
A. Wavelength increases, wave period decreases, and wave height stays the same.
B. Wavelength decreases, wave period decreases, and wave height decreases.
C. Wavelength decreases, wave period increases, and wave height decreases.
D. Wavelength decreases, wave period stays the same, and wave height increases.​