Which Best Describes the Use of Phase Angle Used in Bioelectrical

Which best describes the use of phase angle used in bioelectrical impedance analysis?

A) An additional measure of prognosis in many chronic conditions
B) ​The measurement of stature by using a calibrating device
C) ​The calculation of energy requirements from data obtained through skin-fold measurements
D) ​The measurement of oxygen consumed and carbon dioxide expired 
E) ​The percentage used to evaluate growth patterns relative to population standards