When Mary Robb Purchased a Dozen Cupcakes for Her Son's

When Mary Robb purchased a dozen cupcakes for her son's birthday party, she was pleasantly surprised to find the box contained 13 cupcakes instead of the 12 she had paid for. The bakery used this technique to accomplish which of the following?

A) to make sure the customer would not be concerned about product quality
B) to respond to competitive industries in the global marketplace
C) to cement its customer-supplier relationship with Robin Hood flour
D) to build, maintain, and enhance relationships with its customers