What is true about the constructor’s argument, which sets the button’s title to a desired...

The correct answer is D. In Tkinter, the text displayed on a Button widget is normally configured with the keyword argument text. For example, Button(root, text="OK") creates a button whose visible caption is OK. This value is not determined by the second or third positional argument in a reliable, recommended way. Tkinter widget constructors are designed to receive the parent widget first and then configuration options as keyword arguments. The keyword title is not the standard option for button captions; titles are associated more with windows, such as setting a top-level window title. For a button’s label, the correct constructor argument is text.