Final answer:
User-initiated flows in Flow Designer can run with their own roles by selecting the User Role Override option in Flow Options.
Step-by-step explanation:
A user-initiated flow in Flow Designer can run with its own roles and not the user's roles under specific conditions. The correct option is b. User Role Override selected in Flow Options. When creating or updating a user-initiated flow or subflow on the Flow Properties form, you can select the User Role Override option in the Flow Options section. This allows the flow to run with its own set of roles, independent of the user's roles.
For example, imagine you have a flow that requires administrative privileges to access certain functionalities. By selecting User Role Override and specifying the necessary roles, the flow will run with those roles regardless of the user's actual roles.
Importing a flow template or always using the user's roles are not situations where you can create a user-initiated flow with its own roles.