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

c. troops marched forward in close formation against newer, more accurate weapons

is it multiple choice

1. it was caused by feudalism

2. charlemagne used christianity as a major cornerstone for his rule. cloisters were built all over the empire to act as centers for the (re)population of the vast european wilderness.

3. the europeans feared the next raid every time chetak

i'm not so sure about #6. but i hope i you with the first 3.