ND Daily, a Local City Newspaper, Caters to the Residents

ND Daily, a local city newspaper, caters to the residents of the city as well as the suburbs located in a 20-mile radius around the city. If the market area within the city is referred to as the city zone, the market in the suburbs whose residents trade with merchants in the city zone is referred to as the:

A) local zone.
B) retail trading zone.
C) demarcated zone.
D) peripheral zone.
E) special category zonE.This scenario is an illustration of a retail trading zone.The retail trading zone is the market outside the city zone whose residents regularly trade with merchants within the city zone.