A retail company's database of record resides at a 3rd-party company that also keeps track of purchase history.
That database only updates once a day where new records can be created and merged.
The database uses an "Email ID," which is a numeric field that represents both the business unit and email address.
The company now wants to be able to send real-time Welcome emails to people (newly registered website users) who provide their email address in exchange for getting 10% off their first order, and ensure this send is connected to "Email ID" in the database.
What key issue should be addressed?
Choose 3 answers

A customer has an eCommerce site and Imports data into three data extensions daily; 'Orders', 'Order_Details' and 'Products' the data extension contains the following information:
* Orders: OrderId, CustomerId, OrderNumber, OrderDate, OrderTotal, GrandTotal
* Order_Details: ProductId, OrderId, Qty, UnitPrice, ExtendedPrice, Discount
* Products: ProductId, SKU, Name, Description, Cost, Price
What two actions should be taken in Data Designer?

A customer notices their open and click rates are very low.
Which two aspects of list hygiene should be recommended to improve engagement rates? (Choose 2 answers)

Northern Trail Outfitters is sending to an audience of over one million subscribers. They will use 10 different personalized fields in the email which reside in multiple data extensions. The goal is a timely email send from start to finish as it contains a limited quantity, first come-first served, special offer.
How should they accomplish this task?

A consulting has a data extension that contains all current product information. The customer wants to refresh data each morning by importing a CSV containing today's product catalog. The product catalog is never the same; products can be added and removed.
Which import type should be used?