Answer: C.
Explanations: Many companies go by that standard although they don't necessarily mean it. They are very much aware of how much a customer is important to the company. They should be aware of all the staff and how they are treating the customers, the quality of a product and generally give their best to please someone when they come inside their store.
However there should be certain precautionary measures taken if they encounter with a customer that, beside all the kindness you were offering, is rude, frantic, starts damaging the goods, ambience etc.