Franklin Roosevelt’s New Deal program.
Prosperity.
Calvin Coolidge was in office as president from 1923 to the spring of 1929. In that period of the "Roaring Twenties," the country experienced great economic success -- in between the brief depression that followed World War I and the Great Depression that began with the stock market crash that occurred in the fall of 1929.
The invention of the vapor machine
Answer: he avoided slavery and just promised to keep the union together
Explanation: