In a relational database it is common to have a linking table when there is a many-to-many relationship. A good example is between students and courses taken by a student, where any student can have multiple courses taken, and any courses can have multiple students in that course. In this case, what would be true of the linking table?

a)It would contain the foreign keys StudentID and CourseID and possibly other fields.

b)If the Students table has a primary StudentID value of 101, the linking table would have at least one record with a foreign key StudentID value of 101.

c)It would be composed entirely of the foreign keys StudentID and CourseID, with no other fields allowed.

d)It would be composed entirely of the primary keys StudentID and CourseID, with no other fields allowed.