The speed of a wave depends upon:

A. The wavelength of the wave

B. The amplitude of the wave

C. None of the above

D. The property of the medium through which the wave is traveling

The speed of a wave depends upon (i. e., is causally affected by) ... d. both the wavelength and the frequency of the wave. Whenever the medium is the same, the speed of the wave is the same. However, when the medium changes, the speed changes.