The Compounding of Economic Growth Rates Means That

The compounding of economic growth rates means that

A) a large increase in investment today has little effect on national income over the long run.
B) small changes in sustained growth rates can have a significant impact on national income over several decades.
C) consumers should not save,given the low real returns that compounding produces.
D) a 10% annual rate of return will double an investment in less than 6 years.
E) a 2% annual growth rate of GDP will double national income in 27 years.