A) Incorrect. While it's natural for the family member to be concerned, it's essential to empower them to act in case of an emergency. Waiting for healthcare professionals to arrive may delay life-saving interventions.

B) Incorrect. While CPR should ideally be performed by trained individuals, untrained bystanders can still make a significant difference in saving a life by providing chest compressions.

C) Correct. Encouraging the family member that attempting CPR, even if they are not perfect, is better than doing nothing at all. Hands-only CPR (chest compressions) can be effective and is better than no intervention.

D) Incorrect. While formal training in advanced life support is ideal, bystanders without formal training can still perform hands-only CPR, which involves chest compressions, until professional help arrives.