Final answer:
Vitamin C is the most important vitamin nutrient in promoting postoperative wound healing. Hence the correct answer is option C
Step-by-step explanation:
The vitamin nutrient most important in the promotion of postoperative wound healing is vitamin C. Vitamin C is essential for the synthesis of collagen, a protein that helps in the formation of connective tissue and wound healing. It also acts as an antioxidant, protecting the body's cells from damage.
Hence the correct answer is option C