They both work together, but separation of powers divides the branches and checks an balances helps ensure that one branch doesn't get too powerful or powerful than the other.
Answer: Maybe there fights that they fought
Explanation: The costs of fighting a protracted war on several continents meant Britain's national debt almost doubled from 1756 to 1763, and this financial pressure which Britain tried to alleviate through new taxation in the Thirteen Colonies helped cause the American Revolution.
D) All of the choices are correct.