The planning commission in your town is confused about the difference between urbanized areas (UAs) and urban clusters (UCs) and how they compare to the Office of Management and Budget's metropolitan and micropolitan statistical areas. Which statement(s) could be used to clarify the relationship?
I. Urbanized areas and urban clusters are not related to OMB's metropolitan and micropolitan statistical areas
II. Each metropolitan statistical area contains at least one urban cluster
III. Each micropolitan statistical area contains at least one urbanized area
IV. Urbanized areas and urban clusters form the urban cores of metropolitan and micropolitan statistical areas, respectively
A. IV only
B. II and III only
C. I only
D. II and IV only