Aaron and donald sign a written contract in which aaron agrees to supply raw materials to donald’s company in return for set fees for one year. which form of contract have both the individuals entered into? a. implied contract b. express contract c. unilateral contract d. informal contract

I'm pretty sure that's called a volcano

One of the things that allowed native americans in mexico to settle cities larger than those in areas to the north was "b. the development of cities that were built by an earlier civilizations," since mexico had been the home of some of the world's most advanced civilizations before the columbian invasion