Which of the following best describes how to use a test-retest reliability estimate to assess reliability?
a) administer a test with content based on what a person actually needs to know to effectively perform the job in question
b) administer different tests to a group of people and compare the range of collected test scores
c) administer the same test to the same people at two different points in time and compare their test scores at time 2 with their scores at time 1
d) administer the same test to different people at two different points in time and compare their test scores at time 2 with the scores at time 1

Based on the scenario being described within the question it can be said that the in order to test positively in reliability a test needs to provide the same output no matter how many times the same input is introduced. Therefore the best way to assess the reliability would be to administer the same test to different people at two different points in time and compare their test scores at time 2 with the scores at time 1