(Choose 1 answer)
Suppose R and S are 2 relations. R is the parent of S.And the relationship between R and S is set to "ON DELETE SET NULL".This means that:
A. We can delete a row from R if that row has children in S and in this case, the database server will raise up an error
B. We can delete a row from R although that row has children in S and in this case,all the children will be deleted too
C. We can delete a row from R although that row has children in S and in this case.all the children will be not deleted
Exit (31
