Which license type should a Salesforce Admin use for these Partner Users?

Universal Containers needs to create a Community that meets the following requirements:

– Self-Service Support Community in which customer and partner users are community members.

– Partner Users help Universal Containers by adding of resolving cases for their customers within the Community.

– Partner Users do NOT need access to Leads, Campaigns, and Opportunity objects.

– Partners use Case Comment and Case Feed to communicate with the Universal Containers team and customers.

Which license type should a Salesforce Admin use for these Partner Users?
A . Employee Community License
B . Customer Community Plus License
C . Partner Community License
D . Customer Community License