In order to calculate the rocket's acceleration, we can use the given formula:
[tex]a=\frac{\Delta V}{\Delta t}[/tex]If the change in velocity is equal to 12 m/s and the time interval is equal to 2 seconds, the acceleration is:
[tex]\begin{gathered} a=\frac{12}{2} \\ a=6\text{ m/s^^b2} \end{gathered}[/tex]Therefore the correct option is C.