According to the ASCA Ethical Standards for school counselors, a high school counselor must inform a student's parent/guardian if the student reveals which of the following facts about herself?

The correct choice is the option related to the student having developed a detailed plan for committing suicide. This situation represents an immediate and serious risk to the student's safety and well-being. According to the ASCA Ethical Standards for School Counselors, the primary responsibility of a counselor is to ensure the safety of their students.

When a student discloses a specific plan for suicide, it indicates a high level of risk, as it suggests intent and premeditation. Under these circumstances, the counselor has an ethical duty to take necessary actions to protect the student, which includes informing the student's parent or guardian. This action aligns with the duty to warn and protect protocols commonly upheld in counseling practices.

In contrast, while feelings of depression and hopelessness are serious and require attention, they do not automatically justify the same level of immediate disclosure to parents unless there is an imminent risk of harm. Similarly, breaking school rules or difficulties with friends, although they may warrant a conversation or intervention, do not involve the immediate threat to life that a suicide plan does. Therefore, the specific nature of the disclosure regarding a suicide plan necessitates parental notification to ensure the student's safety.