What Did the Growing Inequality of Income During the 1920s

What did the growing inequality of income during the 1920s indicate?

A) That consumption expenditures would tend to weaken even though total income continued to rise
B) That spending for goods and business incentives to produce those goods became increasingly dependent on the wealthy
C) That the economy became more vulnerable to any shock, such as a stock market crash, that reduced the willingness of the wealthy to buy goods
D) All of the above