Which of the Following Is True with Regard to Primary

Multiple Choice

Which of the following is true with regard to primary firms,first-tier suppliers,and second-tier suppliers?

A) A first-tier supplier is the primary firm to a second-tier supplier.
B) A second-tier supplier is the primary firm to a first-tier supplier.
C) Second-tier suppliers are not as important as first-tier suppliers.
D) To a primary firm,a first-tier supplier supplies finished goods and a second-tier supplier supplies raw materials.