Question

which step ensures that the page margins are not too narrow?
always preview your document or print a test page first to ensure the margins are not too narrow.
zoom out of your document to ascertain how close to the edges of the document your text is.
you do not have to ensure that margins are correct; word will warn you if they are not.
in the page setup dialog box, ensure that margins are not set to less than 1\ for top, bottom, left, and right areas.

Explanation:

Previewing or printing a test page allows you to visually check the actual appearance of the margins. Zooming out may not accurately represent physical margins. Word doesn't always warn about margin issues. Setting margins in Page Setup to at least 1" is a direct way but the most reliable practical way is previewing/printing a test page as it shows real - world results.

Answer:

Always preview your document or print a test page first to ensure the margins are not too narrow.