Which of the following is a sign that a minor can consent to treatment without parental approval?

A minor's ability to consent to medical treatment without parental approval often involves specific legal criteria, which vary by jurisdiction. One sign indicating that a minor can independently consent is being 15 years or older and managing their own financial affairs. This reflects a level of maturity and responsibility that suggests the minor is capable of making informed decisions regarding their health care.

In many legal systems, the capacity to manage personal finances implies a certain degree of independence and understanding, which can extend to understanding the implications of medical treatment. Therefore, meeting this criterion allows minors to take charge of their own health decisions.

Attending high school or having a part-time job do not inherently confer the legal right to consent, as these activities do not necessarily indicate the minor’s capacity to make informed decisions about medical care. Being over 18 years old is a clear indicator that one can give consent, but it does not apply to minors. Thus, the correct answer reflects a specific condition under which minors are granted autonomy in health care decisions, emphasizing their maturity in managing their affairs.