Archaeologists almost always have to to find artifacts of ancient cultures.

a. get very lucky
b. dig
c. climb

the completion of the erie canal spurred the first great westward movement of american settlers, gave access to the rich land and resources west of the appalachians and made new york the preeminent commercial city in the united states.

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;