If you're six miles off track after flying 60 miles
(a) where on earth do you find somewhere you can fly 100 miles in a straight line anyway without busting some airspace or other?
(b) how come you've spent the whole 60 miles not checking and correcting your position, so that you've only just discovered the problem?
(c) anyway, if you haven't been applying any corrective action then only being six miles off track after 60 miles is pretty good going
(d) and you can see some landmark or other that's on your original track - just point at it and fly until you get there!
(e) ... except of course if you can't see six miles you're almost certainly navigating by following needles and dials and magenta lines anyway, so you're still on your original track.
Pity these real-world answers don't get you the exam marks, isn't it.