The correct answer is A. Overtime is when an employee works more hours than they are normally scheduled to work. This can be due to a number of factors, such as a busy work period, a staffing shortage, or an emergency. Overtime is typically paid at a higher rate than regular time.
Option B is incorrect because standard time is the normal amount of time that an employee is expected to work. Option C is incorrect because standard hours cannot be more than actual hours. Option D is incorrect because actual hours cannot be less than standard hours.