I'm pretty sure the answer is "19", but if i'm wrong please don't kill me.
The formula for the volume of a cylinder is pi * r^2 * h and it is equal to 108pi. This makes r^2 = 9 which means r=3
C is your answer
4 x 2 is pretty much 4 groups of 2
hope this helps
I don't know I have work to do SORRY