An industrial firm

a. deals exclusively with federal, state, and local governments.
b. buys physical goods and resells them again without any reprocessing.
c. is one that is independently owned and takes title to the merchandise it sells.
d. in some way reprocesses a product or service it buys before selling it again to the next buyer.

The correct answer is letter "D": in some way reprocesses a product or service it buys before selling it again to the next buyer.

Explanation:

Industrial firms tend to be companies that are in charge of mass-scale production. They can be entities that process raw materials into finished goods or that purchase semi produced goods and gives it an added value before it is provided to end-users. To achieve such levels of productions, industrial firms use the ultimate technology in their fields.