Which of the following is not true?
(A) Generalization is the result of taking the union of two or more disjoint entity sets to produce a higher level entity set.
(B) Specialization is an abstraction in which relationship sets are treated as higher-level entity sets.
(C) Canonical covers are used to decompose a relation into 3NF, which is a small relaxation of the BCNF condition.
(D) The concurrency control management component of the database is responsible for handling the concurrency control policies.
