Suppose We Launch a Disk So It Rolls Without Slipping

Multiple Choice

Suppose we launch a disk so it rolls without slipping up an incline. The disk of course slows down as it moves up the incline. But in what direction does the friction force acting on the disk point?

A) Up the incline
B) Down the incline
C) In some other direction (specify)
D) The friction force is zero in this case.