The radius of a cylinder is increased by a factor of 5. The height is not changed.

What is the effect of the increase on the volume of the cylinder?

A) The volume of the cylinder increases by a factor of 5.

B) The volume of the cylinder increases by a factor of 25.

C) The volume of the cylinder increases by a factor of 15.

D) The volume of the cylinder increases by a factor of 10.