This family was involved in banking and investments not only in the United 2 points States, but even earlier in Europe? ​

a is correct

hope this let me know if it is right

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.