As Used in the Hiring/promoting Part of Human Resource Management

As used in the hiring/promoting part of human resource management, selection methods, such as the use of application forms or tests, must have validity. Validity is best described by which of the following?

A) The same score, approximately, is made each time the same person takes the same test unless additional training is completed between attempts.
B) The score on the selection method correlates positively with past work history.
C) The selection method (e.g. test) actually measures what it is trying to measure.
D) The applicant has not had prior access to the selection method (e.g. test) .