Which of the following best describes artificial nails?

Artificial nails are a category that includes enhancements applied to the natural nail, and option C, which refers to sculptured nails and nail wrapping, accurately captures the essence of artificial nails. Sculptured nails involve the use of materials like acrylic or gel to build an extension or form over the natural nail, allowing for various shapes and designs. Nail wrapping typically involves applying a material, such as fiberglass or silk, over the nail, often used to reinforce or extend the natural nail.

This choice highlights techniques that directly alter or enhance the structure of the nail, making them a clear representation of what artificial nails encompass. The other options do not adequately convey the full spectrum of artificial nail applications. For example, describing artificial nails solely as "only nail tips" fails to recognize the broader techniques used in artificial nail application. Layered polish applications might enhance the appearance of a nail but do not constitute artificial nails in the same way that sculptured nails and wrapping do. Regular manicures focus on the care and maintenance of natural nails rather than the application of artificial enhancements.