18. A study of the Maya, Incas, and Aztecs demonstrates that O pre-Columbian peoples were largely uncivilized
O advanced American civilizations existed before Columbus arrived
Europeans introduced agriculture to the Americas
these people were peaceful prior to European conquest

C

Explanation:

hey,

i hope you are having a wonderful day

the correct answer is :

{b.}   ( american workers lose job opportunities )

hope this : )

    -sprinkles

yes

it is because 3 because the citizen the northern democratic party watned the warning on red to blue because it is purple. lol