your answer is gonna be A
"The religious pluralism of the United States is most noticeable when people request to have different holidays taken off from work". In this case "pluralism" simply means two more things coexisting.
Answer:
A.The barbarian invasion
Explanation:
The most straightforward theory for Western Rome's collapse pins the fall on a string of military losses sustained against outside forces.Rome had tangled with Germanic tribes for centuries,but by the 300s "barbarian"groups like the Goths had encroached beyond the Empire's borders.
(I'm sorry if thats wrong but I tried my best)