Height of a circular truncated cone is 8. Center of sphere O1 with a radius of 2 is on the axis of the circular truncated cone. Sphere O1 is tangent to the top surface and the flank. We can put another sphere O2, satisfying that sphere O2 with a radius of 3 have only one common point with sphere O1, bottom surface and the flank. Besides O2, how many spheres can we put inside the circular truncated cone?
(A)1(B)2(C)3(D)4 geometry3D geometrysphere