Which of the following descriptions fits a non-ionic surfactant?

A non-ionic surfactant is characterized by its ability to remove oil while maintaining skin moisture. This property is particularly valuable in skin care products, as it helps cleanse the skin effectively without stripping it of its natural moisture. Non-ionic surfactants do not have an ionic charge, which allows them to interact gently with the skin and be less irritating than other types of surfactants.

In contrast to options unrelated to moisture retention, being able to use them in acidic formulations does not specifically pertain to their primary function, nor does the ability to create foam easily, which is more characteristic of ionic or anionic surfactants. Furthermore, the presence of a strong scent is not a general trait of non-ionic surfactants; many are formulated to be fragrance-free to cater to sensitive skin or to maintain product stability. Thus, the defining feature of non-ionic surfactants lies in their oil-removing capability combined with their environment-friendly and skin-friendly nature, making option C the most fitting description.