Answer:
A. The invasion of England by the Angles, Jutes, Saxons, and Frisians.
Step-by-step explanation:
The arrival of the Angles, Jutes, Saxons, and Frisians caused Conflict in England. The English language flourished during the Roman occupation of England in the fifth century C.E. According to my research it was the Angles who produced the term "englisc," and the Saxon authors used it to include both their language (native) and the English language.