The Quine$-$McCluskey method of reduction is

A$)$ good for cases where the number of input variables exceeds the designer$$s ability to visualize a graphic method for reduction, e$.$g$.$ K$-$Maps.

B$)$ valuable because it works for any number of variables, there is no logical limit

C$)$ Based on one single Boolean Algebra theorem.

D$)$ all of the above.