Which of the following is an example of the principle of the separation of powers? -congress passing a law and the president enforcing it -the state legislation passing a law and the state governor enforcing it -the town council passing a law and the town supervisor enforcing it -all the above

The correct answer is: "all of the above".

Any goverment (either at the federal, state or local level) has to be divided in three independent branches according to the principle of the division of powers: legislative branch (in the example: Congress at the federal level / state legislation at the state level / town council at the local level), executive power (President/ state governor / town supervisor) or judiciary level. Moreover, a system of checks and balances needs to be established to guarantee that none of the branches gathers enough power as to overrule the others.

in february 1787, congress decided that a convention should be convened to revise the articles of confederation, the nation’s first constitution. in may, 55 delegates came to philadelphia, and the constitutional convention began. debates erupted over representation in congress, over slavery, and over the new executive branch. the debates continued through four hot and muggy months. but eventually the delegates reached compromises, and on september 17, they produced the u.s. constitution, replacing the articles with the governing document that has functioned effectively for more than 200 years.

its c not d   tell me if that´s correct