To ensure that incoming cases are routed to the correct department based on the "Type" field on Cases at SFB Industries, the most effective approach is:

**B. Use Assignment rules & Queues**

Here's why this option is the best choice:

- **Assignment Rules**: Assignment rules in Salesforce are specifically designed to automatically assign incoming cases to users or queues based on criteria specified by the administrator. In this scenario, you can set up assignment rules that evaluate the "Type" field on cases and assign them accordingly. For example, if a case type is "Technical Support," the assignment rule can direct these cases to the technical support queue.

- **Queues**: Queues in Salesforce organize work, or in this case, cases, allowing more than one user to access and work on them. By using queues, cases can be grouped by department, ensuring that they are accessible to all members of a specific department, which enhances collaboration and efficiency.

Other options are less suitable for the described requirement:

- **A. Enable case routing for agents**: While enabling case routing can help distribute cases among agents, this option alone does not specify the use of criteria based on the "Type" field to route cases to the correct department. It’s more about distributing workload rather than categorizing by case type.

- **C. Create a workflow rule to assign users the correct case**: Workflow rules are used to automate actions such as field updates, emails, and tasks based on specific criteria. However, workflows are not typically used for assigning cases to queues or departments. They lack the direct assignment capabilities and the efficient management provided by assignment rules and queues.

- **D. Use Auto-response rules & Queues**: Auto-response rules are designed to automatically send responses to case submitters, not to route cases to specific departments or queues. This option would not fulfill the requirement of directing cases based on their type...