Which of the Following Indicates That a Test Demonstrates Predictive

Which of the following indicates that a test demonstrates predictive validity?

A) Timothy's score on a particular IQ test did not change over ten years.
B) Paul's scores improve each time he takes a particular aptitude test.
C) People who score high on a particular test tend to earn more in the future.
D) Debbie did badly on an IQ test because it required some knowledge of algebra.