Which clue best readers know that the first two paragraphs of my story are structured chronologically?

B. The author includes the years events happened.

Ongoing civil wars western roman empire finally collapsed476 c.e. romulus, the last of theroman  emperors in  the west, was overthrown by the germanic leader odoacer, who became the first barbarian to rule in rome. the order that the  roman empire  had brought towestern  europe for 1000 years was no more.

Icould be wrong but i would say b.