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How is the ButtonGroup class used? Select one or more: a. A ButtonGroup object is used with a set of radio buttons (or radio button menu items), to make sure that at most one of the radio buttons in the group can be selected at any given time. b. To use the ButtonGroup class, you have to create a ButtonGroup object, grp. Then each radio button, rb, that is supposed to be part of the group is added to the group by calling grp. add(rb). Nothing further needs to be done with the ButtonGroup object. c. Creating a set of buttons with the same ButtonGroup object means that turning "on" one of those buttons turns on all other buttons in the group. d. Typically a button group contains instances of JRadioButton, JRadioButtonMenuItem, or JToggleButton.

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How is the ButtonGroup class used? Select one or more: a. A ButtonGroup object is used with a set of...

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