The terms rough, coarse, bastard, second cut, smooth, and dead smooth refer to the __________.

Correct Answer: Option D — both A and C are correct

File coarseness is determined by the spacing between teeth and the overall size of the file. These specific terms describe the density of the cut, ranging from rough (widely spaced) to dead smooth (finely spaced). Proper selection ensures the correct balance between material removal rate and desired surface finish.