A 0.10 kg block oscillates back and forth along a horizontal surface. Its displacement from the origin is given by: $\mathrm{x}=\left(10\mathrm{cm}\right)\cos \left[\right(10\mathrm{rad}\text{}/\text{}\mathrm{s})\mathrm{t}+\mathrm{\pi }\text{}/\text{}2\mathrm{rad}]$. What is the maximum acceleration experienced by the block 

• A

  $10\mathrm{m}\text{}/\text{}{\mathrm{s}}^2$

• B

  $10\mathrm{\pi }\mathrm{m}\text{}/\text{}{\mathrm{s}}^2$

• C

  $\frac{10\mathrm{\pi }}{2}\mathrm{m}\text{}/\text{}{\mathrm{s}}^2$

• D

  $\frac{10\mathrm{\pi }}{3}\mathrm{m}\text{}/\text{}{\mathrm{s}}^2$