A new team in your company wants to move to Salesforce to use the cases for compliance reasons. They have a different process than the current team which happens in sequential order; New, In Progress, Tier 1 Approval, Tier 2 Approval, Closed. How can this best be reflected in Salesforce?

Answer options:

A.Create a record type and update the case status field. Ensure new values are added to record type.
B.Create a custom picklist field to hold these new values
C.Create a record type and add support process. Assign support process to record type. Add values to the existing case status field.
D.Create a record type, page layout and update the case status field. Ensure that new values are added to record type.

Correct Answer: C 
Record types determine the business processes, page layouts, and picklist values that agents use. To help support users create, manage, and resolve cases and inquiries more quickly, you can create support processes. Record types let you offer different business processes, picklist values, and page layouts to different users. You might create record types to differentiate your regular sales deals from your professional services engagements, offering different picklist values for each. Or you might display different page layouts for your customer support cases versus your billing cases. 
Options A & D are incorrect because creating a record type alone without a support process will not resolve the issue. This is because you need support processes to support users create, manage, and resolve cases and inquiries more quickly. 
Option B is incorrect because a picklist field will capture data only, but it will work with different processes. 
References: 

https://trailhead.salesforce.com/en/content/learn/projects/create-a-process-for-managing-support-cases/create-support-processes

Correct Answer: C 
Record types determine the business processes, page layouts, and picklist values that agents use. To help support users create, manage, and resolve cases and inquiries more quickly, you can create support processes. Record types let you offer different business processes, picklist values, and page layouts to different users. You might create record types to differentiate your regular sales deals from your professional services engagements, offering different picklist values for each. Or you might display different page layouts for your customer support cases versus your billing cases. 
Options A & D are incorrect because creating a record type alone without a support process will not resolve the issue. This is because you need support processes to support users create, manage, and resolve cases and inquiries more quickly. 
Option B is incorrect because a picklist field will capture data only, but it will work with different processes. 
References: 

https://trailhead.salesforce.com/en/content/learn/projects/create-a-process-for-managing-support-cases/support-cases-record-types