Why did leaders believe alliances would keep a “balance of power” that would prevent war?

I believe the answer is C.

1 a

2 c

3 c

4 b

5 a

hope this

montesquieu took the view that the roman republic had powers separated so that no one could usurp complete power. in the british constitutional system, montesquieu discerned a separation of powers among the monarch, parliament, and the courts of law.