The Childhood Level Living Scale, Developed by Polansky and His

The Childhood Level Living Scale, developed by Polansky and his colleagues, was questioned as to its validity because

A) the Native American families studied did not represent that large a segment of the population
B) there were reservations about the scale's sensitivity to cultural diversity
C) the panel of experts used to develop it were college professors and not field researchers
D) it became very outdated
E) all of the above