"marble cake federalism" is associated with select one: a. intergovernmental cooperation blurring the lines between different layers of government. b. federal officials bribing their state counterparts with various gifts in order to convince them to follow national standards. c. the end of federalism in the united states. d. the confusion that emerged during the 1960s about which layer of government is actually responsible for regulating the national economy. e. the increase of political power of local governments over the last two decades.