The correct answer is: A. only one owner but many owner occurrences.
An owner-member set is a relationship between two entities, where one entity (the owner) can have multiple instances of the other entity (the member). For example, a “student-course” set could have one student as the owner and multiple courses as the members.
The owner-member set in the CODASYL specifications may have only one owner but many owner occurrences. This means that a single student can be enrolled in multiple courses, but each course can only have one student enrolled in it.
Option B is incorrect because a member can have multiple occurrences. For example, a student can be enrolled in multiple courses.
Option C is incorrect because an owner can have multiple occurrences. For example, a single student can be enrolled in multiple courses.
Option D is incorrect because only option A is correct.
Option E is incorrect because option A is correct.