What are data extension data retention policies?

A customer wants to send an email from Sales Cloud on behalf of the record owner.
How should the consultant meet this requirement?
Choose 2 answers

A customer will provide a single daily file on the Marketing Cloud SFTP at 3 AM and needs an alert if the file is not present on time. The file needs to be: Imported into a staging data extension. Separated into two different data extensions.
Which workflow should meet these requirements?

A customer wants to automate the send of a monthly promotional email. The customer will upload an audience file to their account's Enhanced SFTP on a monthly basis on the 15th day of each month, expecting the email to be deployed upon completion of the import activity. However, if the 15th of the month falls on a Saturday or Sunday, the customer will provide the file on the Friday prior to the 15th and expect the promotional email to be sent on that Friday.
Which method should be used to automate their monthly promotional email?

Northern Trail Outfitters has purchased a new Marketing Cloud account with two dedicated IP addresses. One IP address will be used for commercial sends, while the other will be reserved for transactional messages.
Their customer base includes 1.5 million email addresses.
What should the consultant recommend?