✅ Comprehensive and Detailed Explanation:
Here’s the breakdown of what’s happening in this automation process:
The file is placed (encrypted) in the SFTP location.
File Transfer activity decrypts the file and moves it to the Safehouse.
Import File activity imports the data into a staging data extension.
Data Extract activity converts the DE to a format usable by All Subscribers (e.g., unsubscribe list extract).
File Transfer activity moves that extract file to a designated folder.
Final Import File activity uses that extract to unsubscribe subscribers from All Subscribers.
This full chain ensures secure file processing and proper unsubscription based on Subscriber Key.
❌ Why Other Options Are Incorrect:
A. Lacks the initial File Transfer step to decrypt and move the encrypted file.
B & C. Include unnecessary Query activities that are not relevant for direct unsubscription processing from a clean unsubscribe file.
Exact Extracts from Salesforce Documentation:
File Transfer & Data Extract for Unsubscribe: "Use File Transfer activity to decrypt and move encrypted files into Safehouse. Use Import File and Data Extract to populate unsubscribe lists with Subscriber Keys."
— Source: https://help.salesforce.com/s/articleView?id=sf.mc_as_activities_file_transfer.htm
— Source: https://help.salesforce.com/s/articleView?id=sf.mc_as_data_extract.htm
All Subscriber List Management: "If your account uses Subscriber Key, the unsubscribed file must contain the Subscriber Key and can be processed using Data Extract and Import File activities."
— Source: https://help.salesforce.com/s/articleView?id=sf.mc_subscribers_all_subscribers.htm
