The correct answer is A. Limited government, popular sovereignty
Indeed, States in the Union can only have a limited government since many important powers are reserved to the Federal government and any federal laws or regulations supersede any state laws or regulations. Th principle of popular sovereignty is a constitutive element of boht American federal and State governments as well as the American national ethos. All American elected officials (state and federal) derive their powers (at least in theory) from the consent of the governed.