Certification Aid wants to import an encrypted CSV file from the Marketing Cloud Enhanced FTP server.
Which two File Transfer activities are needed to achieve this? Choose 2.

A developer wants to include an AMPscript if/else statement in an email to satisfy the condition "if the subscriber's tier is not premier then display heading encouraging them to upgrade." The tier value has already been set as variable named @level. How should the developer write this AMPscript conditional statement?

A developer identified duplicate contacts and initiated a Contact Delete process for 10 million subscribers. How could the process be expedited?

Northern Trail Outfitters (NTO) uses a numeric identifier for Subscriber Key. Customer data is stored in a data extension with the Subscriber Key set as a Primary Key.
Which step is required for NTO when creating relationships for this data extension in Data Designer'

A developer is implementing a custom profile center and using the LogUnsubEvent request. Which parameter is required for the event to be tied to the appropriate send?