Which of the following box-sizing property value is described by width and height include content, padding, and borders?

The correct answer is: A. border-box

The box-sizing property determines how the width and height of an element’s box are calculated. The three possible values are:

• content-box: The width and height of the box include only the content of the element.
• padding-box: The width and height of the box include the content of the element, as well as any padding.
• border-box: The width and height of the box include the content of the element, as well as any padding and borders.

In this case, the question is asking which of the following box-sizing property values is described by width and height include content, padding, and borders. The answer is border-box, because this value includes the content of the element, as well as any padding and borders.

The other two options, content-box and none, do not include borders in the width and height of the box.