Which of the Following Statements Is Correct Concerning "Peak Expiratory

Which of the following statements is correct concerning "peak expiratory flow" screening and monitoring with a peak flow meter?

A) When using the peak flow meter, it is important to exhale into the monitor at a steady rate for 6 seconds.
B) The peak flow meter displays the same FVC result as the spirometer, which is the total volume of air exhaled from the lungs over 6 seconds of time.
C) Daily peak flow monitoring is useful for patients with COPD to determine if they need to seek emergency medical care and to see if their medications are working.
D) The physician must be notified if the peak flow meter is in the green zone.