7. A wave moves at a constant speed along a string. Which one of the following statements is false concerning the motion of particles in the string?
A) The particle speed is constant.
B) The particle speed is not the same as the wave speed.
C) The particle speed depends on the amplitude of the periodic motion of the source.
D) The particle speed depends on the frequency of the periodic motion of the source.
E) The particle speed is independent of the tension and linear density of the string.​