How did the catholic church expanded in the middle ages?

How did the power of the Catholic Church expand in the Middle Ages? Europe was unified under the idea that people must convert to Christianity. The church assumed governmental duties and created a church hierarchy. The pope had the same power the Roman emperor once had. The people began to elect their priests, bishops, and cardinals.

google has the answer

explanation:

i searched your question up and it showed me the answer

the correct answer is:

b) a rich merchant.