Which of the following is an example of sales promotion?
A. Tara's Attire adds kids clothing to its existing range of clothes.
B. Sammy Jams advertises about its new jam through billboards.
C. Treats Today gives away samples of its new healthy donuts for free.
D. Yen Yoga passes out flyers to advertise about a new yoga center in the Holmesville.
Answer: C. Treats Today gives away samples of its new healthy donuts for free.