Which of the Following Is True with Regard to Operations

Multiple Choice

Which of the following is true with regard to operations interfaces in a product supply chain?

A) Upstream interfaces typically include individuals or companies that buy and use the firm's finished products.
B) Downstream interfaces typically include suppliers that provide raw materials,components,and parts required in downstream operations.
C) Vertical interfaces include technology management and service support.
D) Horizontal interfaces include the company's relations with its competitors.