12. The four major enterprise applications are ________.
(A) enterprise systems, SCMs, CRMs, and KMSs.
(B) enterprise systems, SCMs, DSSs, and CRMs.
(C) SCMs, CRMs, DSSs, and KMSs.
(D) SCMs, CRMs, ESSs, and KMSs.

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統計： A(0), B(1), C(0), D(0), E(0) #2855532