A. to check the message before sending the finalized delivery
B. to preview a message to test the personalization elements
C. to check the way a message is displayed on a variety of email clients
D. to identify whether your client file is being used fraudulently
Explanation:
Reference: https://docs.adobe.com/content/help/en/campaign-standard/using/testing-and-sending/ preparing-and-testing-messages/managing-test-profiles-and-sending-proofs.html
