A consultant configured a triggered send definition in Sales Cloud for a customer using Marketing Cloud Connect, The trigger is on a Custom Object called 'Shipments' and is enabled for Triggered Sends in Setup.
Which two configuration requirements should be considered when troubleshooting? (Choose 2 answers)

What are two possible outcomes when "Multipart MIME" is selected during the send process? Choose 2 answers

During discovery, the customer outlines data requirements and the anticipated use of Marketing Cloud with the following criteria:
* Customer data will be fully refreshed every night via Import activity from the customer's data warehouse.
* Contact records will be augmented by relational data tables via Contact Builder.
* The customer data file will contain 5M records with 40+ attributes.
* One attribute will house HTML code, 1000 characters max, that will be used to populate Account Access content areas in emails.
* A customer ID will be used as the unique identifier for each contact.
Which statement differentiates the use of data extensions over lists?

What are data extension data retention policies?

A customer provides a file containing only new and updated subscriber records exported from its marketing database.
* The file will be uploaded to the customer's Enhanced FTP automatically at 3AM daily.
* The customer requires that the import completes prior to 4AM.
* On average, the file will contain about 2 million rows of data each day.
Based on the customer's requirements and recommended best practices, how should the daily file be imported?