Answer: B
Correct answer: formatting marks such as spaces, tabs and paragraph marks
Ctrl + Shift + 8 toggles the display of formatting marks - the non-printing characters that show where spaces, tabs, paragraph marks, line breaks, page breaks and section breaks fall. The same toggle is the ¶ button on the Home tab. It is the most useful diagnostic tool in Word. Layout problems that look mysterious usually become obvious once the marks are visible: extra spaces used instead of a tab, blank paragraphs used instead of a page break, a line break where a paragraph mark was intended, or a section break causing headers to change. The marks are worth recognising individually. A dot is a space, an arrow a tab, ¶ a paragraph mark, a bent arrow a line break, and a dotted line labelled Page Break or Section Break the corresponding break. They never print, whatever the setting, so the display can be left on while working.