The Incas were highly advanced in terms of mathematics and
astronomy. Their unique architecture of
massive stonework is made possible by their great understanding of mathematics.
Inca structures where made of precisely hewn stones that fit together so
perfectly without use of mortar. They also understood astronomy and made very
accurate calendars.
Hamilton, Madison, William Samuel Johnson of Connecticut, Gouverneur Morris of New York, Rufus King of Massachusetts
Hoover did not handle the Bonus Army well.
The Bonus Army was a group of 43 thousand protestors - WWI veterans and their families - who gathered in Washington DC to demand payment for their service certificates.
President Hoover did not attempt to negotiate with the protestors, first, he ordered to have them removed from government’s property and later he ordered to the Army to clear the marcher’s campsite.
To do so, infantry and cavalry was used and additionally, six tanks.
Public opinion on Hoover’s actions was strong, newspapers and newsreels - that were popular at the time - showed images of the violence perpetrated on soldiers and their families. This was considered one of the strongest factors that influenced his lost at elections to Roosevelt.
The radio spread news quicker across different regions in the US.
B seems like the best choice.