I believe the answer is: 3. The canals and temples in the city show advanced engineering skills.
The site shows that the Aztec civilization had developed a very advanced irrigation system that utilize different elevation to obtain water for their agricultural field. Their system was later adopted by the spanish empire who invaded their territory.
9.6 millon! that's a lot!
Answer:
The brinkmanship of the Nuclear Arms Race lead to the advancements in the Space Race. Each of the superpowers continued trying to outdo each other in their weapon technology and this competition continued into the Space Race and creating space exploration technology.
The president under whom the federal budget had its first surplus in 30 years, in 1998 and then again in 1999, 2000 (the previous surplus was 1969) was Bill Clinton.
