ANSWER:
A. 29.4 m/s^2
STEP-BY-STEP EXPLANATION:
We have that the value of gravity is equal to 9.8 m/s^2, therefore, if it is 3 times greater, the maximum acceleration would also be 3 times greater, therefore:
[tex]\begin{gathered} a=3\cdot g \\ a=3\cdot9.8 \\ a=29.4m/s^2 \end{gathered}[/tex]The maximum acceleration is 29.4 m/s^2