Why was the subject four appointment automatically canceled?

[ArielLee]

Subject four appointment being automatically canceled may be due to duplicate appointments, and the system might automatically cancel to ensure accuracy. Introduction to Subject Four Exam: The Subject Four exam, also known as the Safe and Civilized Driving Knowledge Test, is conducted after passing the road test. In fact, there is no official term "Subject Four"; the formal name is "Safe and Civilized Driving Knowledge Test." However, most trainees and driving schools refer to it as Subject Four to distinguish it from the Subject Three road test. Subject Four Retake Instructions: If you fail the Subject Four exam, you only need to retake Subject Four. The driving school will schedule the retake for you, and there is no limit to the number of retakes. You can retake it until you pass, and no retake fees are required for Subject Four.