As light moves from one material into the next, which of the following affects how much the light waves will refract, or bend?

He sailed off course on his way back to greenland and ended up in north america

Ithink it is c. the government would try to limit the influence of outside cultures.

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