Which of the Following Outlines the Professional Standards for Respiratory

Which of the following outlines the professional standards for respiratory therapists (RTs) ?
1) American Association for Respiratory Care (AARC) clinical practice guidelines
2) Respiratory care practice act and regulations
3) College granting degree
4) The Joint Commission

A) 2 and 4
B) 1 and 3
C) 1, 2, and 4
D) 1, 2, and 3