Quality Assurance is best described as:

• A. A program to certify suppliers
• B. A method for inspecting finished goods only
• C. A way of preventing mistakes and defects in manufactured products and avoiding problems when delivering products or services to customers
• D. An after-sales service quality benchmark

Answer: (C)

Quality assurance focuses on preventing defects by shaping the processes that create products and deliver services. It’s proactive and process‑oriented, aiming to build quality into what is done, not just to check for problems after the fact. The description that captures this best states that QA prevents mistakes and defects in manufactured products and helps avoid problems when delivering products or services to customers. That highlights both preventing issues in production and ensuring smooth delivery to customers.

The other ideas describe narrower or different concepts: certifying suppliers is a specific program rather than the overall approach; inspecting finished goods only is more about quality control (checking output after the fact); and measuring after‑sales service quality is about service performance after delivery, not preventing defects in the production or delivery process.