Answer:
A) It is located in central Mexico.
Step-by-step explanation:
A megalopolis, this is a geographical term, often referred to as megapolis or megaregion, it is a term that describes city cluster or supercity, which is characterized group of two or more roughly adjacent metropolitan areas, usually defined by its nature which is appears separated or may merge into a continuous urban region.
The megalopolis concept is a widely known geographical concept which became highly influential as it introduced a new, larger scale in defining urban patterns and urban growth.
A common example is New York City and surrounding areas including Long Island.
Hence, from the map, it shows that, the megalopolis in Mexico is located at the central of Mexico.