Which statements describe disadvantages of using flat files? Check all that apply.

Flat files store data without the controls and relationships found in a database, so repeated updates can be slow and prone to mistakes. They can also lead to duplicate information when the same details are stored in multiple places. Therefore, the disadvantages are that errors are easy to make, updates can be time-consuming, and duplicate information tends to occur; flat files do allow duplicate information, so C is not a disadvantage stated correctly.

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