a. do not share any powers. b. are accountable to the people. c. can regulate interstate commerce. d. are totally autonomous. e. are able to establish local governments.
Of the choices given here, the only possible answer is B. In a democratic system, all levels of government are accountable to the people. This is true because the people get to vote for the legislatures and the chief executives of both the federal and the state governments. Because the people get to vote for these officials, the governments are accountable to the people.
None of the other possibilities are correct. The two levels of government share many powers. For example, both levels have the right to impose taxes. It is not true to say that both can regulate interstate commerce. The Constitution explicitly says that only the federal government can do this. Only states can establish local governments. The two levels of government are not totally autonomous as, for example, national laws can override state laws.
Thus, only B is possible as a correct answer.