A. Emperor Alexander Severus, who was assassinated by his troops after a defeat.
B. Roman Senade, which accepted some army generals as legitimate emperors.
C. Security of the border, which they were supposed to keep. While the were fighting among themselves, they neglected the defenses of the Emprire, resulting in invasions.
D. Crisis, which ended with the Reforms made by Diocletian.
Lighting hitting water. I can give an explanation if needed
The United States citizens and residents are targeted. The US Food Administration is telling them not to waste food because they need it for the soldiers and US's allies.
Hope this helps :)
Explanation:
academic study or science that deals with human behavior in its social