Please help me i’ll give brainlist

the Platt Amendment was a treaty between the United States and Cuba that established guidelines for US-Cuban relations. The US wanted to maintain influence in Cuba to protect its interests there, but Cubans were wary of being under the control of another foreign power after recently gaining independence from Spain.

Explanation:

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.