Option B
The president can veto laws passed by the legislature best demonstrates the principle of separation of powers in the U.S. government
Step-by-step explanation:
The concept of separation of powers, as achieved in composing the Constitution, was based on manifold commonly avered opinions: the separation of management into 3 departments; the idea that each department presents unprecedented and identifiable uses that are relevant to all; and the prevention of the employees of all branch to this branch.
To a big degree, the Constitution effectuated these beliefs, but experts complained to whatever they observed as a meddlesome intermixture of purposes, for instance, the veto authority of the President covering legislation and to the purpose of the Senate in the choice of governing directors and jurisdictions and the treaty-making manner.