If you don't have the option for offline tactics what could you consider? (Select 3)

Northern Trail Outfitters (NTO) needs to use a point-and-click tool to test segmentation rules and verify that the correct subscribers are included in the segment. NTO will need to automate the refreshing of the segment once it is tested.
Which two tools should be used to test and configure the segment? (Choose two.)

Northern Trail Outfitters wants to use something other than an email address to identify subscribers.
What functionality can be used to accommodate this?

When a marketer is looking to improve the deliverability of their emails what should be included in the subject line of the email?

Northern Trail Outfitters wants to use a File Drop Starting Source in Automation Studio to send shipping tracking emails when orders are dispatched. A delimited text file containing all the data for the send will be uploaded to a designated directory on the Enhanced SFTP Account, and the email should be sent to customers when the file transfer has completed.
What would be the correct sequence of Activities for this File Drop Starting Source?