Interoperability was a core driver for the federal push towards healthIT adoption. It was essential to accomplish stages II and III of their Meaningful Use initiatives and incentives. Which of the following statements describe interoperability:

1. Interoperability needs to occur within the laws and regulations of HIPAA and ADA
2. Interoperability is allowed not only among providers but also with insurance companies, public health entities and clearinghouses for health related data
3. Interoperability can assist Pharmaceutical companies in executing clinical trials with patients who have explicitly provided consent for this purpose
4. Interoperability can apply to internal data sharing (i.e. automatically loading X-ray results into a patient's EMR record) as well as external sharing (i.e. between a primary doc and a cardiologist)

a. 1, 2, 4

b. 1, 3

c. 3,4

d. All of the above