The answer is the first one, A. It is the source of implied powers.
With America's participation in Vietnam war, military spending grew. It started with Kennedy's little military activity, which later on Johnson would turn into a significant military initiative. In the last period of the 1960's, government failed in raising taxes to pay for this activity, which resulted in the tearing down of the country's prosperity.
The Vietnam War continued to 1975, and after Nixon's resign, America seemed incapable of controlling events, together with economic issues. There was a deficit in trading activity, since cheap imports represented a challenge and inflation rose as well as unemployment. Eventually, America's economic activity decreased significantly, and Vietnam War was the turning point for this.
The Enlightenment, also known as the Age of Reason, was an intellectual and cultural movement in the eighteenth century that emphasized reason over superstition and science over blind faith. Empiricism promotes the idea that knowledge comes from experience and observation of the world.
Well history does show us some pretty cool heroes and some pretty bad villains, but some stories from history are not real for example Poseidon god of the see in Greek myth. Greek myth can be counted as part of history.
