. . . . "The two firms are engaged in _____. ??? ??? ??? Description Quiz Question: If a business owner buys parts by specifying the quantity, grade, and other attributes, which buying method is he using? ??? ??? ??? Gatekeeper Quiz Question: Administrative assistants that control the flow of information to other people in the organization often play the _____ role in the buying center. ??? ??? ??? NAICS Q" .