A particle executing simple harmonic motion has an amplitude of $6\;cm$. Its acceleration at a distance from the mean position $2\;cm$ is $8\;cm/sec^2$. The maximum speed of the particle is :

Question

( A ) $24\; cm/sec$
( B ) $16\;cm/sec$
( C ) $8\; cm/sec$
( D ) $12\;cm/sec$