Answer:
Technicians A is correct
Explanation:
According to ASE ( Automotive service excellence) "Certification credentials are valid for five years. If it has been five years or more since you took a test, it’s time to register for the corresponding Recertification Test. The five-year requirement ensures certified professionals are current in this rapidly changing industry."
This counters the claim of technician B who say the programs must be reviewed every three years , and ASE sends you reminders before your credentials expire.