Which of the following best describes the economic boom in urban and rural america?

The correct option is:

City and suburb residents experienced the most growth due to the economy.

The economic boom in the 1920s was a result of the second industrial revolution in the United States. The American industries increased considerably and labor was promptly available to work due to an urban population on the rise. The city and suburb residents experienced the most growth.

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.