Northern Trail Outfitters (NTO) wants to add automation to its email marketing. Which automation should NTO create as a good first step?

Northern Trail Outfitters imports an encrypted file of its subscribers' favorite colors.
Which automation activity and configuration setting should be used for import to a data extension?

Using measures, what data can a marketer use to segment an audience?

A marketer is configuring Path Optimizer in Journey Builder to test three different email subject lines. They want to configure a holdback audience to receive the winning path, but the option is unavailable.
Why would the marketer be unable to configure a holdback audience?

NTO wants its emails to render uniquely between mobile and desktop devices. NTO would like the emails to be responsive. Which two techniques should be used? Choose 2 answers