Disadvantages of a database management system (DBMS) include:
I.
Less highly trained technical personnel are required.
II.
Increased vulnerability as a common database is highly integrated. A breakdown in hardware or software has a much more severe effect than in a system having separate files and applications.
III.
Audit trails being somewhat obscured as the result of movement of data from one file to another.
Choice "C" is correct. Both II and III are correct. Not I, because disadvantages of a DBMS include more - not less - highly trained technical personnel.