Select all that apply.
Civilizations throughout Meso-American were marked by:

Several rulers throughout the empire.
The use of cacao bean as money.
Landowners were called calpulli.
The arrival of the Spanish.
By temples such as Machu Picchu.

i think your answer there is c

silk

indigo  

rice

all the other answers are wrong

social contract theory, nearly as old as philosophy itself, is the view that persons' moral and/or political obligations are dependent upon a contract or agreement among them to form the society in which they live