Which of the following is an argument for federalism is it states choosing to separate and create new states or common laws throughout the nation or could it be states operating as experimental laboratories for ideas or states taxing cunning from other states?

The argument for federalism that is being described here is "states operating as experimental laboratories for ideas." This argument suggests that allowing states to have some level of autonomy in governing and implementing policies can result in the development of innovative and effective solutions to various problems. By granting states the ability to experiment with different ideas and approaches, federalism enables a diverse range of policies and practices to be tested and potentially replicated or adapted across the nation.