Why is it important to view historical events from a variety of sources?

You get a clear picture without strong bias. you can also tell what different groups think about an event

To get a overall better perspective on the topic. Also different sides can be bias and looking at it from different perspectives can help.

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