Which of the following behaviors is most clearly associated with Jean Piaget's concrete operational stage? A) Nikos can consider both the height and width of a container.
B) Gracie forgets about her toy because it is under her blanket.
C) Ava does not like being around unfamiliar people.
D) Sally thinks everyone's favorite color is blue, because it is her favorite color.

For review 1. in terms of which government is sovereign, differentiate among a unitary system, a confed- eral system, and a federal system of government. 2. to which level of government does the constitution distribute the enumerated po implied powers? concurrent powers? reserved powers? provide several power. 3. what matters fall within the scope of state sovereignty? differentiate among dual federalism, cooperative federalism, centralized federalism, and conflicted federalism. how does the national government use grants-in-aid, mandates, and preemption to direct the policy of state and local governments? 6. what do we mean by intergovernmental relations? why is the term a good description of u.s. federalism today? 7. list several advantages and several disadvantages of a federal system.