Which of the following has historians learn about the inca empire?

the ruins of the olmecs
the ruins of chichen itza
the ruins of tenochtitlan
the ruins of machu picchu

How did the mexcian war of independence differ from the american revolution?

The permo-triassic extinction event had a greater impact on the number of earth's species than did the extinction event at the end of the cretaceous true false

Tori is researching for her blog post about how wearing sunblock can prevent skin cancer, and she finds a page about her topic on the united states centers for disease control website at is this a reliable site for tori’s research? yes, because it is presented by a college or university no, because it is a personal opinion about the subject yes, because it is run by a governmental organization no, because it is intended to advertise a certain product