Answer:
After the Roman Empire disintegrated, the territories were ruled out by different kings and queens. Therefore, Latin knowledge declined. So, the right question here is:
B) Rome was no longer the center of power.
Step-by-step explanation:
After the great Roman Empire disintegrated, there was no powerful reason to conserve Latin as the official language of the empires that rose after the Great Roman Empire fell. Actually, only after the Romans conquered their territories Latin was acknowledged and practiced in many regions. Spain, Morroco, Tunisia, Turkey, France, Greece, Hungary, and the majority of southern European countries were the practitioners of Latin. The northern eastern and central European countries didn't have the presence of Latin in their former cultures because they were never conquered by them. And when the Roman Empire fell, the conquered territories preserved their original languages and many new arrived.