Which Nursing Action Maintains Confidentiality When Performing Height and Weight

Which nursing action maintains confidentiality when performing height and weight measurements during a co-ed physical education class?

A) Having a student worker record the screening findings on the appropriate adolescent's record
B) Having a volunteer weigh and measure the adolescents and verbally give the findings to the nurse to calculate the body mass index and record
C) Providing a privacy screen and having the health aid record the findings directly on the record. The nurse will then calculate body mass index
D) Using a buddy system with the students, having the students measure each other, and then recording the findings.