Ur answering should be B I’m sorry if I am not correct
It was referred to as the age of reason, or simply the enlightenment. People all through France, Britain, and Europe questioned traditional authority and embraced the notion that humanity could be improved through rational change. And the American and French Revolutions were directly inspired by the Enlightenment ideals and respectively marked the peak of its influence and the beginning of its decline. Which gave way to 19th-century Romanticism.
separation of powers
checks and balances
Montesquieu established that the best form of government was one in which the legislative, executive, and judicial powers were separate and kept each other in check to prevent any branch from gaining too much power and becoming tyrannical