A Producing Sector Classification for Grouping Goods, Services, and the Firms

A producing sector classification for grouping goods, services, and the firms that produce them:

A) is broader than an industry classification.
B) is narrower than an industry classification.
C) includes the same number of firms as an industry classification, but arranges the firms differently.
D) may be broader or narrower than an industry classification, depending upon the types of products classified.