What is a purpose of marking an attribute as hidden?

What is the timeline for which an unsubscribe request must be honored and processed as outlined by the CAN-SPAM Act?

The IT department at Northern Trail Outfitters would like to receive email notifications once an automation has completed.
How should the automation be configured?

Northern Trail Outfitters sends order confirmations to customers who have made online purchases. Delivery of these emails must follow the "Transactional" CAN-SPAM requirements.
What feature should the marketer use?

A marketer for Northern Trail Outfitters (NTO) needs to dynamically update the sender name and email address based on the sales representative associated with the account. The data is stored in two separate data extensions.
Which two tools should the marketer use? (Choose two.)