Which statement best completes the following sentence?

one advantage of a federation is but one disadvantage is
citizens can participate at multiple levels of government; the national government may be too weak to provide services
citizens can participate at multiple levels of government; overlapping national and local services may be wasteful
power is concentrated on the national level; the national government may not be aware of local issues
power is concentrated at the local level; the local government may not be able to cooperate on national issues