Final answer:
Self-disclosure in coaching should be relevant and professional.
Step-by-step explanation:
Self-disclosure is the act of sharing personal information in relationships.
When it comes to coaching, self-disclosure can be appropriate, but it should be done in a professional and relevant manner.
C. Self-disclosure must be relevant to the situation. It should involve sharing information that is appropriate for the coaching relationship and helpful for the athlete's development.
Intimate details about the coach's life, as mentioned in option B, are generally not necessary or appropriate for self-disclosure in a coaching context.