Which technologies introduced in the late 1800s aided in the spread of jazz to all parts of the united states and the world?

The answer to the question above is radio and phonograph.
The radio and the phonograph are the technology that was introduced in the late 1800s that aided in the spread of jazz music to all parts of the United States and the world.

Yes, some people used the depression to the max. not everybody had stocks, and those that didn't bought many things inexpensive, so that when prices rose again, they were much more richer than beforehope this