(a) Copying up to 25 words is fair use.
(b) Copying less than 10 percent is fair use.
(c) Copying 25 words or 10% is fair use.
(d) Copying only a small amount is fair use.
(e) If you don’t make money on it, it’s fair use.
(f) It’s fair use if it’s for an educational purpose.
(g) Non-profit organizations can’t be sued for copyright infringement.
(h) It’s fair use if there’s no copyright notice on it.
(i) If the author is dead, you can copy anything he wrote.
(j) As long as you give credit to the author, it’s fair use.
(k) “Fair use” is a myth. There is no such thing.
If you answered (a), (b), (c), (d), (e), (f), (g), (h), (i), (j), or (k), then you failed the test. You’re in good company, though; nearly everybody believes at least one of these things is true.