Answer:
Internal Recruitment/Selection, based on merit.
Explanation:
The local police department gives a Detective test and these are the features of that test;
1. The test is for persons who are already police officers.
This is called internal sourcing / internal recruitment. Instead of having fresh candidates, the police department picked up on employed police officers.
2. Everyone sitting for the test has been a police officer for at least 5 years.
This quality shows that everyone sitting for the test has experience on the job of policing. This also means that the test candidates will be familiar with terms on the test script.
3. The criterion for selection of best candidate is score.
This is a merit selection, hence if an officer of 15 years scores 65% and an officer of 5 years scores 80%, the officer of 5 years takes the vacant detective position.