The value chain model______________. a. sees the supply chain as the primary activity for adding value.b. focuses primarily on collaboration with suppliers.c. helps a firm identify points at which information technology can most effectively enhance its competitive position.d. categorizes four basic strategies a firm can use to enhance its value chain.d. categorizes five related advantages for adding value to a firm's products or services.

The correct answer is letter "C": helps a firm identify points at which information technology can most effectively enhance its competitive position.

Explanation:

Value Chain is a term coined by the American economist Michael E. Porter (born 1947) to describe the interconnected operational practices performed by businesses during the process of converting raw materials into finished goods. The ultimate goal of the value chain is to use the firm's resources such as information technology to create a competitive advantage.