The scatter plot below shows the average number of customers who visit a food truck per day, depending on the number of days the food truck stays in the same location. Which statement best describes the association between the number of days the food truck is in the same location and the number of customers who visit the food truck per day?

A. There is no association.
B. There is a nonlinear association.
C. There is a positive linear association. D. There is a negative linear association.