Option A sounds about right to me. The database management system takes care of the data manipulation, not the operating system. It's like having a personal assistant to do your chores for you.
I think B is the correct answer. The database management system acts as a layer between the application and the operating system, handling all the data operations.
Option D is definitely not correct. The database management system should allow users to manipulate data, not just the administrator. How else would anyone get any work done?
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