Which three content blocks do you need to create using AMPscript to enable personalization?

Northern Train Outfitters wants the From Name on the monthly Newsletter to come from a specific User who is set up in the Marketing Cloud. Which feature would be used to set up this From Name selection?

Which send process can use Sender Profiles? (Choose 3)

Northern Trail Outfitters' marketing team includes the nearest store to customers in the template of its emails.
This data extension only needs to be updated when store information changes, such as when a new store opens or a store closes.
How can this be achieved?

A marketer sends an email to a sendable data extension that contains a Customer_ID field with a numeric data type that relates to the Subscriber Key in All Subscribers as a Send Relationship. What is a true statement about the email send behavior for any subscriber who currently does NOT exist in All Subscribers? (Choose 2)