What did Charlemagne do to ensure his power as King?

“Charlemagne introduced administrative reforms throughout the lands he controlled, establishing key representatives in each region and holding a general assembly each year at his court at Aachen. He standardised weights, measures and customs dues, which helped improve commerce and initiated important legal reforms.”

Explanation:

answer is x. lo xd

he supported the seperation of church and state. he also promoted religious tolerance.