Final answer:
According to the American Nurses Association (ANA) code of nursing ethics, a nurse should not post images of a patient's x-ray film on a public online social network, even if identifiers are removed. Patient identification is still possible.
Step-by-step explanation:
According to the American Nurses Association (ANA) code of nursing ethics, a nurse should not post images of a patient's x-ray film on a public online social network, even if identifiers are removed (option c). This is because patient identification is still possible even with removed identifiers. The code emphasizes the importance of patient privacy and maintaining confidentiality of patient information.