Which of the following can be grounds for disciplinary action in a professional setting?

Engaging in unethical behavior is a well-accepted grounds for disciplinary action in a professional setting because it directly undermines the trust and integrity required for a healthy work environment. Unethical behavior can include actions such as fraud, harassment, discrimination, or any conduct that violates organizational policies or legal standards. Such behavior not only affects the reputation of the individual but can also harm colleagues, clients, and the organization as a whole. It is crucial for professionals to adhere to ethical standards as they contribute to overall job performance, workplace culture, and compliance with laws and regulations.

The other options do not typically constitute grounds for disciplinary action since merely failing to meet sales targets can be seen as a performance issue rather than an ethical one, participating in office events is generally viewed as a positive engagement with the workplace, and having a personal life outside of work is a fundamental right that should not impact professional standing.