A cork floating on the pond water executes a simple harmonic motion, moving up and down over a range of 4 cm. The time period of the motion is 1 s. At t=0, the cork is at its lowest position of oscillation, the position and velocity of the cork at t = 10.5 s, would be 

• A

  2 cm above the mean position, 0 m/s

• B

  2 cm below the mean position, 0 m/s

• C

  1 cm above the mean position, $2\sqrt{3}\pi \mathrm{m}/\mathrm{s}$ up

• D

  1 cm below the mean position, $2\sqrt{3}\pi \mathrm{m}/\mathrm{s}$ up