The Position of a Particle Is Given By $x ( t ) = 23 t - 1.2 t ^ { 3 }$

Multiple Choice

The position of a particle is given by $x ( t ) = 23 t - 1.2 t ^ { 3 }$ , where x(t) is in meters and t is in seconds. The initial ( $t = 0$ ) acceleration of the particle

A) is 0 m/s².
B) is 2.3 m/s².
C) is 23 m/s².
D) cannot be determined.