![](https://blogs.luc.edu/ipbytes/wp-content/uploads/2019/05/allison-batley-9Rmmgj3wsJU-unsplash-870x773.jpg)
Trademark Trivia: Which of the following is NOT a (federally) registered trademark?
A. The smell of Play-Doh
B. Harry Potter’s Marauder’s Map password, “I solemnly swear I’m up to no good”
C. The basketball sensation around Jeremy Lin, “Linsanity”
D. Paris Hilton’s catchphrase, “that’s hot”