C. Vikings took over the monasteries and burned them down.
Explanation:
Since the Vikings were not Christian, monasteries were favorite targets of these raiders for the loot that could be found within their walls. The Vikings launched an early attack on the monastery of Lindisfarne on a small island off the East coast of England. The monastery was plundered and burned, while monks were either killed or enslaved.
<em>I hope this helps.. apologies if it doesn't</em>
