Final answer:
The ODB/CDI classification system is a Hierarchical system with a clear link.
Step-by-step explanation:
The classification system used by ODB/CDI is a Hierarchical system with a clear link. In this system, the database is organized in a hierarchical structure where the data is categorized into different levels or branches based on their relationships.
For example, in a library database, books may be classified hierarchically by their genre, such as fiction, non-fiction, mystery, etc. Each genre can then be further subcategorized, like science fiction, romance, historical fiction, etc. This hierarchical structure enables easy navigation and identification of related data.
Therefore, option c) Hierarchical system with a clear link is the correct classification system used by ODB/CDI.