The correct answer is: D. all of these
A textbox and a combo box are both controls that can be used to enter text. A list box and a combo box are both controls that can be used to select from a list of items. A label is a control that is used to display text. A text box, a combo box, a list box, and a label can all be edited at runtime.
A textbox is a control that allows users to enter text. It is typically used to enter data, such as a name or address. A textbox can be formatted to change its appearance, such as its font, size, and color.
A combo box is a control that combines the features of a textbox and a list box. It allows users to enter text or select from a list of items. A combo box is typically used to select from a list of options, such as a country or state.
A list box is a control that allows users to select from a list of items. The items in a list box can be displayed in a single column or multiple columns. A list box is typically used to select from a list of options, such as a list of products or a list of employees.
A label is a control that is used to display text. It is typically used to provide information about the other controls on a form. A label can be formatted to change its appearance, such as its font, size, and color.
All of these controls can be edited at runtime. This means that the text in a textbox, the items in a list box, or the selected item in a combo box can be changed while the program is running.