Final answer:
The situation described is an example of marketing automation software, which sends reminders and offers to customers to encourage the completion of purchases online. The correct option is A.
Step-by-step explanation:
The customer placing shoes in an online shopping cart and receiving an email reminder with a free shipping offer is an example of marketing automation software.
This technology is used by companies like Zappos to track customer behavior and provide timely reminders and incentives to encourage the completion of a purchase.
To deal with the challenge of customers not being able to physically examine products, companies like L.L. Bean utilize strategies such as a money-back guarantee and maintaining a reputation for quality to give customers confidence in their purchases and encourage sales through mail, telephone, or website transactions.