I'm revamping a survey form for my company, and we started by taking the old form, scanning it as a PDF, and exporting it as a Word file. Most of the errors created in the transition process I've been able to fix, but there's one that's still puzzling me, and that's this line inbetween two lines of text: http://i.imgur.com/E9jIs.jpg

Unlike other lines that appeared, I can't click on it to delete it. Double-clicking brings up the margin menu, which I honestly know little about and don't know what to tinker with. What should I adjust so that this line is deleted or becomes invisible?