Who had the most power in the Islamic world, the sultan of the Abbasid caliph?

a

explanation:

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.

they both wanted to stop protestantism, they felt a call in life and it was to strengthen the church. charles used inquisition, philip used army's, charles gave control to outsiders, philip centralized all power.

hope this you !