Answer:
The answer is c. institutional repository.
Step-by-step explanation:
Institutional repository is appropriate for locating and providing open access sources published by scholars who have not yet been published in a peer-reviewed journal. One of the main advantages of having an institutional repository is to provide open access to scholars research works that are self-archived in an open access repository, but which have not yet been published in a peer-reviewed journal. In so doing, there is greater visibility, globally, for a higher number of scholarly research works.