<span>C. It promoted the spread of Christianity across the Roman Empire by allowing people to worship freely.</span>
Answer: Outside Invaders Threatened Border Areas
Explanation: There were string of military losses sustained against the Germanic Tribes. Rome has been at constant war with the Germanic Tribes for centuries and by 300 AD, a Tribal group called the Goths had encroached the borders of the Roman Empire. In the year 410, Visigoth King Alaric sacked the city of Rome. Then the Vandals tribe sacked Rome in 455 as well. It was in 476, when the Germanic Leader Odoacer staged a revolt and deposed of the Emperor Romulus Augustulus. It is at this moment that Western Rome falls and the Medieval Age begins as Europe falls into a dark age.
The period of <span>Muhammad in Medina</span><span> started with the </span>Hijra<span> (migration to Medina) in 622 and ended with the </span>conquest of Mecca in December 629. <span>Muhammad instructed his followers to emigrate to Medina until virtually all of his followers had left </span>Mecca<span>. Being alarmed at the departure of Muslims, according to the tradition, the Meccans plotted to assassinate him. he fooled the Meccans who were watching him, and secretly slipped away from the town.</span>