An Example of S-Retailing Is When

An example of s-retailing is when

A) a customer has their credit card skimmed when making an online purchase.
B) a customer posts a review of a product with 5-star satisfaction.
C) a customer shops and compares items only in store and also makes their purchase in a store.
D) a customer utilizes the self-checkout system at a store.
E) a customer clicks on an advertisement on Facebook and is connected to the advertiser's website to make a purchase.