What Does the Correction for Attenuation Formula Show

Multiple Choice

What does the correction for attenuation formula show?

A) what the validity coefficient would be if the test was longer (i.e., had more items)
B) what the validity coefficient would be if the predictor and/or criterion were perfectly reliable
C) what the true variance in individuals' scores would be if range restriction was not present
D) what the validity coefficient would be if criterion contamination was not present