5. The actions below are examples of what process? • prohibiting kings from appointing priests
• outlawing the selling of Church positions
• excommunicating Holy Roman emperor Henry IV
O A. developing a hierarchy of Church officials
B. strengthening the power of the Church
C. improving efficiency in government
D. protecting the wealth of monarchs

The anwser is b

Explanation:

these are all things that the pope would do to strength the power of the church

b is the answer i am assuming

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.