A bullet leaves a rifle with a muzzle velocity of 521 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of 0.840 m. What is the acceleration of the bullet (assume a uniform acceleration)?

A.$\overrightarrow{a}=1.62\ast 10^{5}m/s^{2}$

B.1.7 m/s

C.$\overrightarrow{a}=1.5\ast 10^{5}m/s^{2}$