What is a capability of a data relationship?

Northern Trail Outfitters (NTO) has a small catalog of items featured in company emails. The NTO marketing team manages what images, copy, suggested items, and call-to-action are used with each item in this catalog within a database. This data is saved into a data extension in Marketing Cloud and then called into the emails dynamically.
Each time a change is made to the content, a new, updated file is dropped on NTO's SFTP. A proof email is then sent to business stakeholders for final approval.
Using Automation Studio, how can NTO ensure that the catalog stays up-to-date?

A marketing team is using two systems to send emails. The team wants to maintain unsubscribe information between both of the systems. In order to remain compliant, they would like to update Marketing Cloud subscription status weekly based on unsubscribes from the other system.
Which solution should they use to maintain subscriber status?

Northern Trail Outfitters' (NTO) branding guidelines require heavy use of imagery on its website, apps, emails, ads, etc.
What are two ways that NTO can optimize its email design to honor branding guidelines and ensure subscribers are getting the best experience possible? (Choose two.)

An email marketer has been tasked with increasing open rates on a weekly newsletter that currently uses a consistent, identifiable subject line: "NTO Weekly: Topics of interest this week." Which two best practices should the marketer use to make the subject line more effective? (Choose two.)