Which of the following best exemplifies a product that would be classified under the "Service" category?
A) A pre-assembled computer system since it is a tangible good that is sold as a complete package to the customer.
B) A software license with one year of technical support included, as the support aspect represents a follow-up activity after the initial sale.
C) A gift certificate redeemable for merchandise in the store, as it represents a form of stored value to be used for future purchases.
D) A handcrafted piece of jewelry that requires careful packaging and handling due to its delicate nature and high value.