What Argument Does the Text Offer in Support of Metropolitan-Wide

What argument does the text offer in support of metropolitan-wide government?

A) because economies are essentially regional in nature, governance should be too
B) because urban sprawl is getting out of control, regional governance is needed to protect the interests of central cities
C) because citizens have little interest in local politics, regional politics might provide more interesting candidates and races that motivate people to vote
D) because politicians in large cities have more experience and specialized expertise, they could offer suburban towns a greater level of political professionalism than they are currently accustomed to