What variable that affects a product’s perceived value has to do with how the functions of a product or service are implemented, such as a fitness tracking watch that gives you updates on your health over time?

A. rarity
B. packaging
C. function
D. features

C. function

Is this right

Yes, that is correct. The variable that affects a product's perceived value related to how the functions of a product or service are implemented is "function." In the example given, the fitness tracking watch's ability to give updates on health over time enhances its perceived value.