The correct answer is D. inline.
The display
property specifies the type of box that an element generates. The inline
The inline-block
value treats the element as an inline box that can be floated and absolutely positioned.
The list-item
value treats the element as a list item. List items are displayed in a list, and they can be indented and have a bullet or number next to them.
The block
value treats the element as a block box. Block boxes are displayed on a new line, and they can be floated, absolutely positioned, and have a width and height.