Which of the following contributed to the collapse of the western Roman Empire?

Although the options aren't listed from my knowledge it was the inability to maintain control over they land they possessed but also the civil war the fought amongst each other over who should be emperor and such.

i think its either b or c

explanation:

nations must cooperate to bring about and maintain world peace.

nations must not wage wars or commit war crimes in a desire to control other nations.

i think i know which options you have but if these aren't options let me know