The integrity constraint that specifies that the value (or existence) of an attribute in one relation depends on the value (or existence) of the same attribute in another relation is called:

A) foreign integrity.
B) attribute integrity.
C) referential integrity.
D) dependence integrity.
E) join integrity.


C
Explanation: C) For instance, you can't have StudentID in STUDENT_CLASS unless StudentID already exists in STUDENT.
CL

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