"huge growth in defense spending" and "bailing out savings and loan companies" were responsible for a dramatic growth in government debt. The war spending had to do mostly with the Cold War.
The "boom" years of the 1920's were characterized by a growth in the use of Automobiles.
While looking at the history of the United States, the 'boom years' of the early 1920s were marked by a huge change in the way people traveled.
Personal transportation was shifting from horse-driven carriages to Automobiles, recently mass-produced by Ford.
At the time, the automobiles were a clear sign of growing economic might of the United States and the optimism of the early 1920s.
Books back then were hand written and made by hand so it took a lot of time an hard work to assemble one, that's the reason they were so expensive.
Concurrent power are those powers practiced and executed at the same time, in a common area and within the same group of people by the State and Federal government in a jointly manner. Also, concurrent powers deal with political powers that are used by the state and at the same time, by Federal governments.
Concurrent powers are very useful for the different levels of Government because they allow them to maintain people´s safety, stop criminal acts, improve the economy and at the same time, to punish and stop criminal actions.
The correct answer will be an example of concurrent power is when a federal law enforcement agency helps a state police. This is a classical example of both agencies acting together for the common good of their citizens.