Which of the Following Statements Best Summarizes the Problem of Scale

Which of the following statements best summarizes the problem of scale attenuation effects?

A) There is no such thing as perfectly good or perfectly bad performance.
B) The size of the intervals of a dependent measure are unequal when you approach the extreme ends of the scale.
C) It is impossible to determine whether there are differences among experimental conditions when performance is polarized at either the high or low end of the scale of the dependent measure.
D) Most of the dependent measures used to study memory are relatively unconstrained and thus allow for easy interpretation of performance levels.