I think it’s 2 but i am not too sure
The answer is c the discovery of oil
1. The automobile was an affordable way for Americans to travel. Many Americans had automobiles before the had a proper toilet. 2. The economic "boom" was called the Roaring Twenties. The contributing factors were automobiles, movies, etc. 3. President Coolidge believed in Federalism.
I hope that I got that right. :)
Answer:
democracy, but you are gonna have to answer this on your own buddy, this is a personal response!
Explanation: