What was the worst commodity introduced to the New World by the Colombian Exchange?? HELPPP!!!

a.tensions between the colonial elites and the backcountry men of virginia.

i think it's a)sparta

because its important to learn about other countries and how high tech they are compared to us. also its good to learn about other cultures and how ours differs and in common also we need to learn about companies that we still buy since they ship it here.

d.

the northwest territory became the most densely populated area in the u.s.