A Marketing Cloud admin discovers large sends are not meeting send speed goals set by the organization.
What functionality would get messages out the door faster?

A Marketing Cloud admin runs the Contacts Counts report and sees there are currently 500,000 contacts in their account. They have a total of 300,000 email subscribers, 200,000 synchronized contacts, and 75,000 mobile subscribers.
Why would the total contact count be less than the total number of contacts from all data sources?

Northern Trail Outfitters wants to business analyst to import contact lists. The analyst has the following Marketing Cloud roles: Marketing Cloud Channel Manager and Marketing Cloud Viewer. The analyst logged in but is unable to import contact lists.
How should the user be updated to allow the analyst the appropriate access?

What functionality is contained in Journey Builder that does not exist in Automation Studio?

A Marketing Cloud admin wants to ensure email sends exclude their testing prefix of [PREVIEW] in the subject line when deploying from Email Studio.
What should the admin do to prevent the prefix from deploying in live sends?