Us government !

the u. s. constitution is based on several principles of american democracy. is the principle "separation of powers" among those evident in the document?

a. no, it is absent because the president determines the power and authority of the people.
b. yes, it is reflected because the amendments list the powers given to the individual people.
c. no, it is missing because government power is concentrated in one branch of government.
d. yes, it is shown because the first three articles describe the three branches of government.