The Sharp Differences in Wealth of Citizens in Different States

The sharp differences in wealth of citizens in different states and consequent variation in taxable resources available for given states' programs are a(n) _________________.

A) encouragement of the "laboratories of democracy"
B) example of lack of accountability
C) example of strengthening individual liberty through division of powers
D) disadvantage of federalism causing disparate programs for citizens of different states
E) example of reliance of courts to define the nature of federalism