A uniform cylinder of radius $a$ originally has a weight of 80 N. After an off-axis cylinder hole at $2a/5$ was drilled through it, it weighs 65 N. The axes of the two cylinders are parallel and their centers are at the same height.
A force $T$ is applied to the top of the cylinder horizontally. In order to keep the cylinder is at rest, the magnitude of the force is closest to:
(A) 6 N
(B) 10 N
(C) 15 N
(D) 30 N
(E) 38 N