Which of the Following Is True Regarding Compensation for Hours

Which of the following is true regarding compensation for hours worked under the Fair Labor Standards Act when an employee is asked to be on standby - that is,available to return to work while off duty?

A) If an employee is asked to be on standby, the hours spent on standby will not be counted as hours worked if the employee is generally free to use the time for his or her own purposes.
B) If an employee is asked to be on standby, the hours spent on standby will be counted as hours worked for which the employee is entitled to compensation even if the employee is generally free to
Use the time for his or her own purposes.
C) If an employee is asked to be on standby, the hours spent on standby will be counted as hours worked; but the employee is only entitled to one-half of the employee's regular pay for those hours.
D) If an employee is asked to be on standby, the hours spent on standby will be counted as hours worked; but the employee is only entitled to three-fourths of the employee's regular pay for those
Hours.