The answer is D.
The formula for the volume of a sphere is [tex] \frac{4}{3} \pi r^{3} [/tex]
You would divide the diameter in half which would give you your radius (r).
Then you plug in the radius value to find the volume of ONE ball.
You would then multiply by 10 to find the volume of TEN golf balls.
D is the closest answer to the volume of ten golf balls