Answer:
1. GDP
2. Increased by 50 percent
3. Economy
4. Income Increases
Explanation:
Between 1921 & 1929, U.S. "Gross Domestic Product" nearly "increased by 50 percent". As " Economy" and "Income level increases," so did people's ability to buy new products.
This was a period known as the "Roaring twenties" in the United States as it was characterized by an economic boom with an increase in purchasing power of the average citizen resulting from the availability of jobs and credit facilities.
