The displacement of a particle from its mean position (in m) varies with time according to the relation y = `0.2 sin (10pit+1.5pi)cos(10pit+1.5pi)` . The motion of the particle is
A. not simple harmonic
B. simple harmonic with time period 0.2 s
C. simple harmonic with time period 0.1 sec
D. along a circular path