A 'Temporal' Trigger Might Be Which of the Following

A 'temporal' trigger might be which of the following:

A) A patient calls to make an appointment with a doctor
B) The accounting department needs information for a report
C) The human resources department needs a tax withholding form to be filled out by a new employee
D) The date changes to the first day of the month
E) A new shipping of goods arrives and needs to be added to the inventory