Marketing Cloud admin is asked to determine the total number of emails sent across all of their business units in the last calendar year Where would the admin retrieve this information?

A Consultant has a data extension that contains all current product information. The customer wants to refresh data each morning by importing a CSV containing today's product catalog. The product catalog is never the same; products can be added and removed. Which import type should be used?

Where would a Marketing Cloud admin view all verified email addresses?

Northern Trail Outfitters (NTO) is building a journey which randomly sends five different versions of an initial welcome email to new subscriber however, subscribers receive the same follow-up email two weeks later. To improve maintainability of their email content, NTO want to use 3 completely different emails, rather than having one email with dynamic content.
Which activity would allow NTO to build the journey with the fewest activities possible?

A Marketing Cloud admin is tasked with requesting Marketing Cloud Connect Multi-Org enablement.
What consideration should be given to the preference profile centers for this integration?