What recommendation would provide a scalable solution for the start-up?

A start-up meal delivery company recently launched in Canada to great success. Customers can order individual meal kits for up to six people or subscribe to a weekly meal kit delivery. As a new company, resources are limited, but demand is taxing their manual processes for sending out eCommerce messages, such as order confirmation and subscription confirmations.

What recommendation would provide a scalable solution for the start-up?
A . A scheduled automation to send daily transactional messages.
B . A file drop automation to send transactional messages.
C . A manual email send for each transactional message.
D . Triggered email sends to deliver transactional messages.

Answer: D