Metal Fabrication Plants Are an Example of a Bulk-Gaining Industry

Metal fabrication plants are an example of a bulk-gaining industry because

A) the mills are near the mines.
B) separate parts are combined to make more complex and massive products.
C) refineries import most material from other countries.
D) parts suppliers package shipments in bulk containers for processing in the plants.
E) parts suppliers supply components with just-in-time management.