after the roman empire collapsed, the catholic church began to unify europe by\ntaking on many duties of a…

Brief Explanations:

After the Roman - Empire's collapse, there was a power vacuum. The Catholic Church filled this by taking on functions like law - making, tax - collection, and dispute - resolution which are typically government duties, thus unifying Europe. Attracting Christians alone doesn't necessarily unify in a political or social sense. Priests were not elected by the people in that era, and making the pope as powerful as an emperor was more of a result of its power - taking rather than a means of unification.

Answer:

taking on many duties of a government.