The Practitioner Who Is Supervising a Student of Ultrasound Notes

The practitioner who is supervising a student of ultrasound notes that the student measures the fetal biparietal diameter using the inner distal edge of the skull. Which is the best response to this observation?

A) Allow the student to continue with fetal measurements without interfering.
B) Inform the student that the measurement must be repeated using the outer edge.
C) Let the student proceed with the exam and provide correction away from the patient.
D) Have the student stop, review the standards for fetal measurement, and resume the exam.