How can this requirement be met?

UVC has two types of customer support processes: Platinum and Diamond. The App Builder created separate record types for each process on the Case Object. The customer support team should not be able to create new cases with the Diamond record type.

How can this requirement be met?
A . Update the profile to remove the Diamond record type from the support team
B . Make the record type hidden to all users and then use sharing rules to share it
C . Update the OWD to private
D . Remove the ability for the support team to create new case records

Answer: A