A Solid Disk of Radius R Rolls Down an Incline

Multiple Choice

A solid disk of radius R rolls down an incline in time T.The center of the disk is removed up to a radius of R/2.The remaining portion of the disk with its center gone is again rolled down the same incline.The time it takes is:

A) T.
B) more than T.
C) less than T.
D) requires more information than given in the problem to figure out.