Which sentence uses the word "unique" in a way that is often contested or identified as "wrong"? a) we went on a very unique tour of the underwater caves found in tennessee. b) my parents did not want to go on just any vacation; they wanted a unique one. c) ever since i was a child, my mother has told me that i was a unique type of kid. d) this type of pastry is unique in that you can only buy it in this county in florida.