Multiple choice discussion?

In what way, barring use of a sleuth, would the following connundrum be solved? What do you call a dog hair cutter?

(a) a "dog" cutter

(b) Cut Co.

(c)a doggie bag

(d) all of the above

(e) all of the below (but not e)

(f) all of (b)

Multiple choice discussion?

a dog groomer

Multiple choice discussion?

The solution to this problem is simple, althogh i am a sleuth, so perhaps i shouldnt respond, but i will anyways, from process of ellimation, d and e are both correct, since a-c are correct, but also f is correct since b is correct therefore all the answers but e are correct since it states that it is incorrect in itself