Ethics question for a Computer Science person or Engineer

The Health Insurance Portability and Accountability Act (list all that applies)

A. ensures that a consumer can sue doctors and hospitals for medical malpractice.

B. attempts to limit the exchange of information among health care providers to that information necessary to care for the patient.

C. ensures that a consumer can keep the same health care provider even when he or she changes employers.

d. ensures that doctors and hospitals can counter sue patients who file frivolous medical malpractice claims.