[amp_mcq option1=”x-index” option2=”y-index” option3=”z-index” option4=”all of the mentioned” correct=”option3″]
The correct answer is C. z-index.
The z-index property is a CSS property that specifies the stacking order of positioned elements. The higher the z-index value, the higher the element will appear in the stacking order.
The x-index and y-index properties are not valid CSS properties.