Which of the following was a major cause of American economic
prosperity in the 1950s?

America came out on top after world war two, while places like Germany and Japan and Italy and much of Asia was ruined, making America a dominant world power. Wedominated industry and many people were able to find jobs and population was booming and rock and roll was about to come out, which made everything better

Explanation:

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.

troy donahue,   i think.