Which of the following property specifies the stack order of an element?

The correct answer is: B. z-index

The z-index property specifies the stacking order of an element. An element with a higher z-index value will appear in front of an element with a lower z-index value.

The order property specifies the order in which elements are laid out on a page. Elements with a higher order value will be laid out before elements with a lower order value.

The p-index property is not a valid CSS property.

The auto value for the z-index property means that the element’s z-index will be determined by the browser.