The answer is 1871....
I know this for a fact!!!......
Through civil disobedience, as in protesting or using the first ammendment right to voice your opinion
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.