How can barbers maintain client confidentiality in a barbershop?

Maintaining client confidentiality is crucial in a barbershop setting as it builds trust and ensures the privacy of clients. The correct answer emphasizes that barbers should not share personal information without the client's consent. This principle is aligned with ethical practices and legal standards surrounding client confidentiality.

When barbers respect the boundaries of what information can be disclosed, they honor clients' privacy rights and comply with regulations designed to protect personal data. This practice not only safeguards sensitive information about clients but also reinforces their confidence in the barber’s professionalism and commitment to their well-being.

The other choices reflect practices that compromise confidentiality and could jeopardize the trust relationship between a barber and their clients.