The correct answer is: D. word-spacing
The word-spacing
property sets the space between words in a block of text. It can be used to add or remove space between words, or to create a specific spacing effect.
The display
property specifies the type of box that an element generates. It can be used to create inline elements, block elements, or inline-block elements.
The white-space
property controls how white space is handled in a block of text. It can be used to prevent line breaks, to wrap text around images, or to add space between words.
The sr
property is used to provide alternative text for screen readers. It is not used to set the spacing between words.