Final answer:
The best course of action is to add an addendum to the report with the correct information, the current date, and the EMT's initials.
Step-by-step explanation:
The best course of action in this scenario would be to D. Add an addendum to the report with the correct information, the current date, and the EMT's initials.
Adding an addendum to the report allows you to accurately document the missed blood glucose reading and provide a clear record of the incident. This helps ensure that the patient's medical record is complete and accurate, which is essential for future reference and to maintain professionalism.
Reporting the error to the State Department of Emergency Medical Services is not necessary in this case, as it was a documentation mistake and not a critical error that directly affected patient care or safety.