The best answer would be that "<span>The GNP rose dramatically and the United States changed from a debtor nation to a creditor nation" but the middle class definitely improved as well.</span>
An example of a theory is Evolution, we don't really know 100% how we came to be as we are now, but we do know that 1+1=2 as a fact, same with gravity, we Know it exists because it's what ties us to earth and we can "feel" it, but not Evolution, Evolution is a theory, just like the BingBang
<span>There were several important points of controversy between the Eastern Orthodox church and the Roman Catholic church. Namely, they could not decide on the nature of the Holy Spirit, or what sort of authority the pope should have. Additionally, they could not agree on whether to base themselves out of Constantinople or Rome.</span>
The answer is true the homes in the Nile delta were made out of wood.