Which of the Following Refers to a Metropolitan Area

Which of the following refers to a metropolitan area?

A) a large city or municipality that serves as an economic and cultural center for a region
B) the larger area surrounding a metropolis that is heavily influenced by the metropolis, generally consisting of suburbs and other smaller cities
C) the largest local level of government below the state, currently used in 48 states
D) a community on the fringe or an urban area, defined by relatively high levels of commuting to the urban area, low housing density, and high population growth
E) a local level of government within counties that are usually organized around population centers