Under hipaa, which one of the following statements is true regarding the release of phi by covered entities to business associates? a. covered entities aren't allowed to release phi (identifiable or de-identified) to business entities. b. once a covered entity releases information to a business associate, the associate may disclose that information to other entities. c. covered entities are responsible for the use of phi made by business associates. d. covered entities must require adequate assurances in writing that business associates will adequately safeguard phi.