Question

Why did the Carolingian empire decline?

Invasion by Germanic tribes led to chaos and armed insurrection within the empire.

Attacks on the Christian church by Muslims led to disintegration of law and order.

Groups of foreign invaders looted and pillaged the empire in search of wealth.

The inability of the empire’s bureaucracy to collect taxes led to a bankrupt treasur

Answer 1

treasury*

Answer 2

i think it is b @Mehek14

Answer 3

i change my mind C @Mehek14

Answer 4

I agree with C. When Charlemagne died, the kings who succeeded him were not capable of wielding reins of power, influential nobles forced these weak successors to give them special rights. These shows the weakness of the central government, that is why the local governments (which had begun to develop during the decline of Rome) again became important

Because the region became disunited, they fell easy prey to new sets of invaders.
The invaders did bad things to towns and churches, but during all these, the central government did nothing to protect its people.

Hope this helps :D