These items are describing what type of government system? A: confederate

B: oligarchy

C: parliamentary

D: presidental​

C

Explanation:

The answer is C :3

Explanation:

- "schenck v. united states, case in which the u.s. supreme court ruled on march 3, 1919, that the freedom of speech protection afforded in the u.s. constitution's first amendment could be restricted if the words spoken or printed represented to society a “clear and present danger.” "

- speech aimed to potentially create danger could be banned.

< 3

i believe it d) heterogeneous