I want to know the answer to the following question:
When did Alfred the Great begin his reign?
All the background I'm provided with is that "In Anglo-Saxon England, King Alfred the Great (r. 871–899) came to an agreement with the Viking invaders in the late 9th century, resulting in Danish settlements in Northumbria, Mercia, and parts of East Anglia.". Is that enough to answer the question?
Answer: yes