When playing a musical instrument, the amplitude, frequency, and wavelength of sound waves can change. Which statements about energy and sound waves are correct? I. The energy of a sound wave is proportional to its amplitude.
II. The energy of a sound wave is proportional to its frequency
III. When volume increases, the energy transmitted by the sound wave increases. IV. When wavelength increases, the energy transmitted by the sound wave increases.

A:I, II, AND IV
B:I, II , AND III
C:I, III, AND IV
D:II, III, AND IV​