Separation of powers between different branches of government was the feature of government that Montesquieu argued for in his book De l’Esprit des Lois (Spirit of Laws).
The Spirit of the Laws (French: De l'esprit des lois, originally spelled De l'esprit des loix; also sometimes called The Spirit of Laws) is a treatise on political theory first published anonymously by Charles de Secondat, Baron de Montesquieu in 1748 with the help of Claudine Guérin de Tencin.
The correct answer between all the choices given is the second choice or letter B. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.