What information and data about the performance of an individual send can be exported from the tracking details?

A marketer wants to overwrite the data in a data extension on a daily basis using Automation Studio. What can the marketer do to accomplish this task?

A new data extension named "Orders" contains order data. One row is recorded for each customer's order.
Customers can place multiple orders. The data extension Orders relates to other data extensions. The data extension Orders contains the following fields:
OrderNumber: a unique alphanumeric order number
customerID: a numeric customer identification number
OrderDate: the system date and time for the order
Instructions: an optional alphanumeric string that contains customer delivery notes. Which statement accurately reflects the configuration of the Orders Data Extension?

Northern Trail Outfitters would like 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 is the correct sequence of Activities for this File Drop Starting Source?

Northern Trail Outfitters wants to maintain enterprise-wide opt-outs for two segments of their subscribers stored in data extensions: Education Events and Sales.
What feature should be used to manage their opt-out strategy?