Pressing the enter key when the button is on focus produces . . . . . . . .

Button's properties
Button's click event
Dialog box to change button name
Removes the button

The correct answer is: B. Button’s click event.

When the enter key is pressed when the button is on focus, it will trigger the button’s click event. This event can be used to perform any action that you want when the button is clicked. For example, you could use it to open a new window, send an email, or play a sound.

Option A is incorrect because the button’s properties are not accessed when the enter key is pressed. Option C is incorrect because a dialog box to change the button name is not displayed when the enter key is pressed. Option D is incorrect because the button is not removed when the enter key is pressed.