The correct answer is: A. command button
A command button is a control that is used to execute commands. It is one of the most important controls in a user interface, as it allows users to interact with the application and perform actions. Command buttons are typically rectangular in shape and have a label that describes the action that will be performed when the button is clicked.
A radio button is a control that is used to select one of a set of mutually exclusive options. It is typically represented by a small circle that is filled in when the option is selected. Radio buttons are often used in conjunction with check boxes, which allow users to select multiple options from a set.
A label
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