A chemical disinfectant's efficacy is its ability to provide which of the following?

A chemical disinfectant's primary purpose is to kill bacteria and other pathogens, making option B the correct answer. Disinfectants are designed to eliminate a wide range of microorganisms, including bacteria, viruses, and fungi, thereby ensuring a hygienic environment. This function is essential in esthetics and other healthcare settings to prevent the spread of infections and maintain client safety.

The other choices do not align with the primary function of a chemical disinfectant. Soften skin refers to a property typically associated with moisturizing agents, which enhance skin texture rather than disinfect it. Moisturizers are formulated to hydrate and maintain skin moisture, but they do not possess the antimicrobial properties needed for disinfection. Similarly, exfoliators are meant to remove dead skin cells and improve skin texture, not to kill pathogens. In summary, the key role of a chemical disinfectant revolves around its ability to effectively eliminate harmful microorganisms, ensuring safety and cleanliness in beauty and health practices.