Final answer:
The papillary layer, located just below the stratum basale, is responsible for nutrient absorption, with its abundant blood vessels and loose connective tissues. Option B is correct.
Step-by-step explanation:
The papillary layer is the upper layer of the dermis, located just below the stratum basale of the epidermis. Its roles include providing nutrient absorption to dermal cells and the lower layers of the epidermis, as well as facilitating sensory reception through structures such as the Meissner corpuscles.
This layer is characterized by a loose arrangement of collagen fibers and an abundance of small blood vessels, which not only supply nutrients but also remove wastes. Additionally, it contains phagocytes which help in defending against infections. Its finger-like projections, known as dermal papillae, increase the surface area for exchange and strengthen the connection between the dermis and the epidermis.