Which is not a example of cultural diffusion in the United states

The hot-dog though would not be part of the cultural diffusion, as the modern version of the hot-dog is an American invention, not something imported and adopted from abroad.

The hot-dog though would not be part of the cultural diffusion, as the modern version of the hot-dog is an American invention, not something imported and adopted from abroad.please brainlist

me with my last question i posted

b.unemployment reached nearly 25 percent.