Final answer:
The setVisible method of the JFrame class does not return any value as it is a void method. It is used to show or hide the associated window.
Step-by-step explanation:
The setVisible method is a part of the JFrame class in Java Swing, which is used to show or hide a window. When you call setVisible(true) on a JFrame object, it makes the window visible; conversely, setVisible(false) makes the window not visible. Importantly, the setVisible method does not return any value; it is a void method. Therefore, the correct answer to what kind of argument the setVisible method returns is:
a) The setVisible method does not return a result.