How did easy credit contribute to the boom times in the 1920s?

just read explantation

Explanation:

The Easy credit of the 1920's saw a massive increase in consumer indebtedness, together with an equally dramatic decline in savings. 75% of the population spent most of their yearly income to purchase goods including food, clothes, radios, and automobiles. Consumer Credit outstanding in 1929 totaled over $3 Billion.

i believe your answer is d)

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