What is the purpose of using a nail file with a finer grit?

Using a nail file with a finer grit is essential for smoothing the nail surface without causing any damage. Finer grit files are designed to refine the edges of the nails and help achieve a polished appearance. They create a smooth finish that minimizes the risk of splitting or tearing, which can happen with coarser grit files. This is especially important when preparing the nail for nail polish application, as a smooth surface allows for better adherence and a more aesthetically pleasing result.

While creating intricate designs, filing nails quickly, or shaping nails can be important tasks in nail care, they are not the primary purpose of using a finer grit file. The emphasis of finer grit is on achieving a smooth and well-cared-for nail surface, making option B the most accurate choice.