In Microsoft Dynamics AX 2012, which of the following statements describe Optimistic Concurrency Check (OCC) on a table? (Choose all that apply.)
A. OCC means that fewer locks must be placed on database records.
B. OCC means that more locks have to be placed on database records.
C. The system performs OCC by comparing the ModifiedBy field of the record buffer and the actual database record.
D. The system performs OCC by comparing the recVersion field of the record buffer and the actual record in the database.
E. OCC presumes that any record retrieved from the database is not updated until it is actually proven to be updated by the database.
