In the UML class diagram below, students and professors point to the registered user class, and these two arrows indicate straight lines ()

In the UML class diagram below, students and professors point to the registered user class, and these two arrows indicate straight lines ()

A . Students or professors can query registered users
B . Students and professors are specific forms of registered users
C . Registered users are students or professors
D . The relationship is unidirectional

View Answer

Answer: B