At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string at that instant is

• A

  Sinusoidal shape with amplitude $\frac{\mathrm{A}}{3}$

• B

  Sinusoidal shape with amplitude $\frac{\mathrm{A}}{2}$

• C

  Sinusoidal shape with amplitude A

• D

  Straight line