The Historical Record for the United States Since 1900 Shows

The historical record for the United States since 1900 shows

A) mostly positive economic growth, with two substantial periods of negative economic growth.
B) economic growth for about half the years and economic decline for the other half.
C) growth until 1970 and then a period of constant per capita real GDP.
D) continuous economic growth, although at different rates, throughout the entire century.