The correct answer is: C. scan
The scan property specifies whether an element is an accelerator indicator or not. An accelerator indicator
The animation property specifies the animation that will be used to show or hide an element.
The accelerator property specifies the keyboard shortcut that will be used to activate an element.
The none of the mentioned option is incorrect because it does not specify a property that can be used to specify whether an element is an accelerator indicator or not.