To answer this question, the user needs to know the purpose of the CancelButton property and what object it belongs to.

The CancelButton property is used to specify the button on a form that is clicked when the user presses the Esc key. This allows the user to quickly cancel an operation or close a dialog box.

Based on this information, we can conclude that the CancelButton property belongs to the Form object. Therefore, the correct answer is:

The Answer is: B (Form)