To perform a quick deployment for change sets or Metadata API components without testing the full deployment, it is required that each class and trigger that was previously deployed is covered by at least 75% joint test coverage. This ensures that the majority of the code being deployed has been sufficiently tested to maintain functionality and stability in the production environment.
Reference: Salesforce Deployment Considerations

Reference: Salesforce Einstein Bots

Reference: Salesforce Performance Management

Deploying a new email channel integration effectively requires comprehensive preparation:
A: Implementing data validation rules ensures that incoming email data like subject lines and customer information is accurate.
B: Configuring automated case creation and assignment based on email content helps streamline the handling process.
C: Testing the integration with sample messages ensures functionality across different scenarios before going live.
These steps together ensure data accuracy and the smooth operation of the new email channel.

Ensuring the security of sensitive customer data during migration requires a multi-layered approach. Data encryption both at rest and in transit, via SSL/TLS protocols, ensures the data is protected against unauthorized access during transfer. User permissions and field-level security within Salesforce restrict access to sensitive data. Data anonymization or pseudonymization techniques mask sensitive information, providing additional privacy. " D. All of the above, forming a multi-layered approach to data security during and after migration " offers comprehensive protection for sensitive data throughout the migration process.Reference:
Salesforce Data Security