9. A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5.0 sin (πt + π/3). The velocity (in m/s) of the body at t = 2.0 s is
(A)+8.0,
(B) -8.0,
(C) -5.0,
(D) -14.0,
(E) +14.0.