Answer:
The correct answer is C. Los Angeles, San Diego, and neighboring cities mutually support each other in their urban development and expansion. These cities have grown together into one continuous urban community, and together they are an example of a megalopolis.
Step-by-step explanation:
A megalopolis is a very large metropolitan area or a long chain of almost continuous metropolitan areas. A megalopolis can also be defined as the coalescence that results from the independent growth of various metropolitan areas. The term was first used in the United States by Jean Gottman in 1957, to refer to the entire metropolitan area of the east coast of that country, extending from Boston, Massachusetts to the city of Washington, DC and that includes New York City and Philadelphia.