Final answer:
Child welfare workers must obtain parental consent before interviewing a minor due to legal and ethical standards, confirming that the statement is true.
Step-by-step explanation:
From the context provided, the answer to the question of whether child welfare workers must obtain parental consent before interviewing a minor is True. It is generally a legal requirement for parental consent to be obtained by child welfare workers before interviewing a minor, as children are not legally competent to provide consent for themselves. This consent process is crucial in ensuring the legal and ethical standards are adhered to when interacting with minors in a professional setting.