Which of the following are considered value-adding primary activities?

Comprehensive and Detailed Explanation:

In Michael Porter's Value Chain model, primary activities are those that are directly involved in the creation and delivery of a product or service. These include:

Inbound Logistics:Activities related to receiving, storing, and distributing inputs internally.

Operations:Transforming inputs into the final product.

Outbound Logistics:Distributing the final product to customers.

Marketing and Sales:Activities that inform buyers about products and services, induce buyers to purchase them, and facilitate their purchase.

Service:Activities that maintain and enhance the product's value, such as customer support and repair services.

Firm infrastructure and technology development are considered support activities, as they assist the primary activities in helping the organization achieve its competitive advantage.