Answer:
The correct answer is: Chaldeans overthrow the Assyrians because Chaldeans hated their harsh new rulers and Assyrians never got completely control over them.
Step-by-step explanation:
Because of the disagreement with the Assyrians the king Nabopolassar lead a riot to reclaim his kingdom. More people wanted to break free like The Medes, so they teamed up together and defeat the Assyrian empire.