二陈业务规则

Question

With this ER Diagram what three business rules can be assumed?

I know it's simple but I've searched for an answer to this question but I have yet to find anything that explicitly states what I am looking for in terms of exactly how to pronounce each rule.

Answer 1

1. Each student may study more than one module.
2. Each module may have more than one student studying it.
3. Each module may have one or more prerequisite modules that must be studied by the student before studying this module.