Let R(a, b, c) and S(d, e, f) be two relations in which d is the foreign key of S that refers to the primary key of RConsider the following four operations in R and SI. Insert into RII. Insert into SIII. Deletion from RIV. Deletion from SWhich of the following can cause violation of the relational integrity constraint above?

Let R(a, b, c) and S(d, e, f) be two relations in which d is the forei

1.	Let R(a, b, c) and S(d, e, f) be two relations in which d is the foreign key of S that refers to the primary key of RConsider the following four operations in R and SI. Insert into RII. Insert into SIII. Deletion from RIV. Deletion from SWhich of the following can cause violation of the relational integrity constraint above?
A.	Both I and IV
B.	Both II and III
C.	All of these
D.	None of these
Answer» C. All of these

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