The correct answer is: A. The control source property.
The control source property determines what is displayed in a control. It is a property of a control that specifies the value that is displayed in the control. The control source can be a field in a table, a constant, or an expression.
The display property determines how a control is displayed. It is a property of a control that specifies the appearance of the control, such as its font, size, and color.
The comes from property determines where the data in a control comes from. It is a property of a control that specifies the source of the data that is displayed in the control. The data can come from a table, a query, or a form.
The data property determines what data is stored in a control. It is a property of a control that specifies the value that is stored in the control. The data can be a field in a table, a constant, or an expression.