Again me and my home girl are playing a game called "you won't" so we have to put on social media how many brownskins or darkskinns are on here

Which of the following situations best demonstrates the principle of separation of powers in the u.s. government? a. the president can veto laws passed by the legislature. b. the courts must approve constitutional amendments. c. states create their own educational policies. d. members of the legislature are elected by voters.