Which action will the Validate tool complete when initiated?

A marketer needs to send emails to all 20 members of the creative team for proofing as a part of an email campaign.
Which Preview $ Test Content Personalization option should be used?

A file is received daily from the data provided to the account FTP this file is to be imported into the marketing clouds as soon as it arrives, the arrival time of these files varies by several hours from day to day what tool should be used to accomplish this.

Which app do you use to set the default greeting option?

Northern Trail Outfitters has hired a new email designer who needs to be trained in AMPscript. Which statement best describes how AMPscript can be used to customize email messages?