In the 1950s Southern states attempted to prevent integration of their public schools. In return, the National Guard was sent to force states to implement federal regulations. This scenario illustrates which of the following about the relationship between the state and national governments? A Most issues regarding education are settled at the state level. B The Constitution gives state governments the exclusive power to interpret federal laws C The power of the national government to enforce state policy had been struck down by the Supreme Court. D The debate over the role of the central government and state powers is ongoing.