What should an Architect consider while planning the deployment of such components?

Universal Containers (UC) is using Salesforce for their sales organization. The sales users have created several dashboards using multiple running users. The admins have also added a few workflow rues that send email notifications to some sales users.

What should an Architect consider while planning the deployment of such components? Choose 2 answers
A . If the username in the source org doesn’t exist in the target org, the deployment will continue and Salesforce will automatically create the username in the target org.
B. User fields are ignored during metadata deployments and all such users need to be manually created in the target org before starting the deployment.
C. If the username in the source org doesn’t exist in the target org, the deployment will stop until the usernames are resolved or removed.
D. User Fields are preserved during metadata deployments and Salesforce attempts to locate a matching user in the target org during deployment.

Answer: C,D