I. Over 200 languages were spoken in North America. ii. Between 2 and 7 million Native Americans lived in North America.
iii. Each Native American tribe participated in a unique culture.

All of the above characteristics describe what North America looked like .
A.
before Native American tribes practiced agriculture
B.
after early humans crossed the Bering Land Bridge
C.
just prior to Native American and European contact
D.
during the last major Ice Age

As you drive in to school, you hear a random radio-show caller arguing that sun exposure really has not been shown to cause skin cancer and that some research suggests that skin cancer is completely genetic and not related to sun exposure at all. at the time, you think that this is a silly argument and that the caller does not know what she is talking about. however, two months later, you are outside without wearing sunscreen, and you find yourself remembering that you had read something about how the sun actually does not cause skin cancer. this process is evidence that has influenced your attitude