I think it was numbers and supplys
He was the first African American president
Aztecs built chinampas ('floating gardens') in order to provide additional farm lands (answer C). The idea was to grow crops in small rectangular areas (ci. 30 x 2.5 m) on shallow lake beds. Aztecs began to use chinampas in Tenochtitlan in about 1250 AD.
The correct answer is the Electoral College
Although Al Gore won the popular vote he was not declared the winner because George Bush defeated him in the Electoral College votes which are what determines the winner. Nevertheless, the vote was close and remains controversial
Prison and death camps for enemies, with Hitler there were the famous concentration camps, and with Stalin there were the ever-so-similar gulags