Quality in the Practice of Respiratory Care Encompasses Which of the Following

Quality in the practice of respiratory care encompasses which of the following?
1) Personnel performing care
2) Equipment used
3) Method or manner in which care is provided
4) Level of experience of respiratory care providers

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