Cadilengy, a nonprofit organization, is conducting a food fair in the month of October. The proceeds of this fair will go to charity. The restaurants and food product companies participating in the fair start distributing pamphlets about the fair in their outlets two months before the event. As a result, the fair gained popularity among the public. Which of the following marketing strategies does this scenario best illustrate?
选项：

A: People marketing
B: Place marketing
C: Event marketing
D: Idea marketing