You are missing some information that can be valid to the question:
A. Metropolis
B. Megalopolis
C. Suburb
D. Urban zone
The large connected urbane area from Boston to Washington is often referred to as the "urban zone" or option D. A urban zone is some sort of a region that is surrounding a area mainly cities, or towns. Urban areas are wealthy well built areas that have big houses, high income, and commercial buildings.
Hope this helps.
