Each jmenu can contain options, called jmenuitems, or can contain submenus that are JMenus
Users operating the keyboard to navigate a menu can access a submenu by pushing the right arrow key or collapse the submenu by pressing the left arrow key. In the picture, the "Recent Files" menu choice has a submenu arrow. If Recent Files was selected, it shows a cascading menu of all current files opened in this program
A sub-menu is a derivative menu that is reliant on a top-level menu in a visual user interface system. Common software environments such as Microsoft Windows have more or less qualified users to be able to recognize controls for accessing sub-menus, which are often hidden from a start screen.
To learn more about sub-menu, refer
https://brainly.com/question/13147261
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Complete Question is,
a. JMenuBars
b. JMenuChildren
c. JSubMenus
d. JMenus
