HIPPA Provides DHHS with Several Layers of Authority

HIPPA provides DHHS with several layers of authority. Which of the following is part of this designated authority?

A) ability to specify the medical and administrative code sets
B) empowered to require use of national identification systems
C) may specify the types of measures required to protect the security and privacy of personally identifiable health information
D) a & b
E) a, b, & c