A nurse is teaching a client about the purpose of flushing their IV site before and after medication administration. Which of the following information should the nurse include in the teaching?

A. While sterile technique is important during IV care, flushing the IV is not primarily for maintaining sterility. B. Flushing can help clear air, but its main purpose is not air removal. C. Flushing the IV line before and after medication administration helps verify patency (that the line is working properly) and ensures that the entire medication dose is delivered. D. Flushing can help reduce medication interactions, but it is not specifically a method to minimize medication errors.