Which statement is true? A CRT is a higher-level respiratory therapy certification. Every CRT is also an RRT. A RRT is a certification that adds a specialization. Every RRT is also a CRT.

A RRT is a certification that adds a specialization.

Explanation:

Renal replacement therapy (RRT) is a term that covers all types of treatments for cases of renal failure including hemodialysis, peritoneal dialysis, hemofiltration and kidney transplantation. This type of therapy allows medical interventions to be made to allow acid-base regulation in the body, while the kidneys are unable. This type of therapy presents itself as a certification that adds a specialization.