Reference: Salesforce Security Best Practices

Identifying and handling duplicate entries during data cleansing for case migration involves multiple strategies to ensure data integrity. Matching and merging records based on common identifiers like email addresses or phone numbers is effective in eliminating duplicates. Data quality rules and duplicate detection tools can systematically flag potential duplicates for further review. Manually reviewing case details provides a final check to ensure no duplicates slip through. Hence, "D. All of the above, depending on the complexity and desired level of automation for duplicate case handling" covers all necessary methods for thorough duplicate management.
Reference: Salesforce Data Management

Moving a WhatsApp number used in a testing sandbox to production typically requires involvement from Salesforce Customer Support. Unlike some other configurations that can simply be recreated or entered directly in the production environment, transferring such digital engagement channels like WhatsApp often involves specific considerations, such as compliance with the WhatsApp API terms and configurations that may not be directly controllable by the administrator. Therefore, "C. Log a case with Salesforce Customer Support" is the appropriate step to ensure the WhatsApp number is correctly and effectively moved to production.
Reference: Salesforce Digital Engagement Guide

Einstein Bots, available on the Salesforce AppExchange, are an excellent solution for organizations lacking advanced AI capabilities for case deflection. These bots use artificial intelligence to automate responses to common customer inquiries and can be integrated seamlessly into Salesforce systems. They help deflect routine cases by providing immediate answers to customers, reducing the load on human agents and improving overall efficiency.

To access the call transcripts configured in Amazon Connect, the consultant should direct agents to the Conversation Component in the Service Console. This component integrates communications from Amazon Connect, displaying real-time and historical interaction data, including call transcripts. The Conversation Component allows agents to access and review detailed call transcripts within the familiar Salesforce environment, facilitating better customer service and follow-up actions.
Reference: https://help.salesforce.com/s/articleView?id=sf.voice_integration_amazon.htm