Vitamin C is needed for the proper repair of:

Vitamin C plays a crucial role in the synthesis of collagen, a key protein that helps maintain the structure and integrity of the skin and various connective tissues. This vitamin is essential for the healing process, promoting the repair of skin and related tissues after injury or damage. By aiding in collagen production, Vitamin C contributes to the overall health and function of the skin, helping to maintain its elasticity and firmness. Furthermore, it acts as an antioxidant, protecting skin cells from damage caused by free radicals.

While other options mention components of the body that do benefit from Vitamin C to an extent—such as blood vessels, which rely on collagen for integrity—the primary and most well-known role of Vitamin C is its direct impact on skin and connective tissue repair. This makes the choice focused on skin and tissues the most accurate in the context of Vitamin C's significance in repair and healing processes.