Final answer:
The correct answer is C) calculated. A calculated control in database applications is used to display dynamic data based on expressions that can perform operations, use functions, or even custom code.
Step-by-step explanation:
A calculated control is a control whose data source is a calculated expression that you create. The correct answer to the question is: C) calculated.
For instance, in a form or a report within a database application, a calculated control might display the result of a calculation involving other data fields, such as summing totals or calculating the average of a series of numbers. These expressions can perform mathematical operations, use built-in functions, or incorporate custom code depending on the complexity required.
Such controls are essential in forms and reports where dynamic data is presented, allowing for more interactive and user-responsive interfaces in database applications.