Answer: C. People were willing to borrow money to buy products instead of saving for them.
Explanation:
In the 1920s, the expansion of credit took place and allowed many middle-class Americans to purchase luxury goods they could not buy before.
Americans bought products on credit or on margin. For example, credit expansion enabled middle-class people to buy automobiles which were out of their reach before.
However, people could not finance loans for luxury products, which later contributed to the Great Depression (1930s).