Final answer:
A driver's daily Record of Duty Status on an ELD (Electronic Logs) must be approved at the end of each day.
Step-by-step explanation:
A driver's daily Record of Duty Status on an ELD (Electronic Logs) must be approved at the end of each day. This is because the record represents the driver's activities and hours of service for that day. By approving the record at the end of each day, the driver acknowledges the accuracy and completeness of the information logged. This helps ensure compliance with regulations set by the Department of Transportation (DOT) and promotes safety in the transportation industry.