The correct answers are C. Users, D. Public Groups, and E. Roles and Subordinates.

Manual sharing is used when the org-wide default is private and users need to share individual records on a case-by-case basis. Salesforce documentation confirms that manual sharing allows users to share individual records with other users, public groups, and roles.

A public group can include users, roles, and roles with subordinates, which makes it useful when sharing records with departments or groups of people.

A. Permission Set Groups is incorrect because permission set groups grant permissions, not manual record-level sharing.

B. Private Groups is not the standard manual-sharing option tested here.

===========