The mayan civilization a. lasted about 1000 years b. hit its peak about a. d 750. c. was defeated by the aztecs d. came to a mysterious end.

D. Came to a mysterious end.

Explanation:

The Mayan civilization was a pre-Hispanic civilization that was found in Mesoamerica (southern Mexico and central America). The Mayan civilization was one of the most advanced cultures in the Americas, with huge, advanced cities such as Palenque, Chichen Itza and Tikal. However, the culture came to an end in a mysterious way, although it most likely happened as a result of urban pressures.

the consumer demand because the members have to be aware if people are going to buy what they want to sell in this case either energy drinks or a car wash.

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.