Answer:
A. Leadership in the Western Empire was weak and emperors and generals fought over land.
C. War, famine, and disease took many lives, leaving fewer people to farm and fight.
Step-by-step explanation:
The Roman Empire was divided into two namely the Eastern and Western Empire. Both Empires did not agree on some terms, and therefore could not effectively carry out any given work together, especially in the area of fighting threats. They would both fight over military arms and personnel. They started competing over one another. Over time, the Western Empire grew weak while a part of the Eastern Empire grew stronger in riches and the other part faced economic depression. Regardless, with their strength, the Barbarian could not invade the Eastern Empire but the Western Empire. These actions gradually caused Rome to decline.
Also, the Emperor mismanaged the funds as they overspent on things like parties and prostitutes. They neglected to expand the Gold mine business which helped to boost their economy, and this gradually reduced the value of their currency.