Answer:
they were no longer focused on issues involving illness and war
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.
D) The Pullman Company lost more money fighting the strike than if they have paid out by giving in to workers.