What is the difference between the National Committee for Quality Assurance (NCQA) and the Utilization Review Accreditation Commission (URAC)?

Minimum of 300 words with at least 2 peer review reference in 6th edition APA style.

Health plans participating in the Affordable Care Act must be accredited; what is the difference between the National Committee for Quality Assurance (NCQA) and the Utilization Review Accreditation Commission (URAC)? Why would a health plan select one over the other?