Which of the following best describes an advantage of federalism? A.
It encourages national unity.
B.
It provides a uniform form of government.
C.
It contributes to greater efficiency.
D.
It allows states to experiment with different policies.

b

Explanation:

a

disequilibrium means that either supply is greater than the demand for an available good, or that the demand for a product outstrips the available supply. it implies that the price for a is either too low creating large demand, or too high creating a large surplus of supply.