When Jim Goes to Phu Vinh, His Local Vietnamese Restaurant

When Jim goes to Phu Vinh, his local Vietnamese restaurant, and orders his favourite dish, a chicken satay, he notices that sometimes the portion size is quite generous while at other times it is quite small. He also notices that the satay is often garnished differently and that the satay sauce often has a coarser texture and spicier taste. Jim is experiencing the service characteristic of:

A) intangibility.
B) inseparability.
C) variability.
D) perishability.
E) autonomy.