Which of the following statements is true of concurrent validity?

Concurrent validity is difficult to assess because employees are not always readily available and cannot take the predictor test immediately.

Concurrent validity is disadvantageous in that it increases the time needed to complete a validation study.

Concurrent validity is measured when applicants' test results are compared with subsequent job performance.

Concurrent validity is measured when an employer tests current employees and correlates the scores with their performance ratings on appraisals.