Which is not an example of cultural diffusion in the united states?
a. eating a hotdog at a barbecue
b. going to a sushi restaurant
c. attending a live opera event
d. taking a latin dance class

A. Eating a hotdog at a barbecue

Explanation:

The United States is a place where the cultural diffusion can be seen everywhere and with pretty much everyone. The reason for this is that people from every corner of the world live here, and all of them has brought their own culture, some of which has been adopted by the others. The sushi restaurants are a Japanese trait, but they are popular in US, the opera is an Italian drama type but it is visited in the US, and the Latin dance classes are very popular despite them being based on the Spanish and later Latino cultures. The hotdog though is not something that can be put into the cultural diffusion, with the reason being that the hotdog is an US invention.

the gutenberg bible was and about 180 copies were sold/made

i think economic depression and disrupted trade and commerce