The difference between required standards and addressable standards is:
select one:
a. a facility must report on compliance with the required standards and simply keep track of addressable ones.
b. a facility must comply with required standards and address the addressable ones as needed.
c. required standards are mandatory; addressable ones can be negotiated.
d. required standards are mandatory; addressable ones are optional.

b. a facility must comply with required standards and address the addressable ones as needed.

Explanation:

Required standards are those requirements which a facility is obliged to comply to if it really has to operate. Failure to observe a required standard directly replicayes to breaking of rules.

On the other hand, addressable standards are the requirements which are put in place to allow for some room for the covered entities with regard to their compliance with the set standards.

c is the newer have a great day