Final answer:
Inappropriate editing in healthcare documentation is represented by altering the patient's medical history, which is unethical and can compromise patient care.
Step-by-step explanation:
The inappropriate editing of dictation by a healthcare documentation specialist is represented by the option (c) "Changing the patient's medical history." Editing in healthcare documentation should aim to clarify, correct, and ensure readability without altering the factual content or clinical data of a patient's medical records. Thus, correcting grammar and spelling errors, clarifying medical terminology, and ensuring accurate documentation are all appropriate functions of a healthcare documentation specialist. However, changing any part of the patient's medical history goes beyond the scope of ethical editing and can compromise patient care due to the potential introduction of inaccuracies in the medical record.