Kareem is working on a project for his manager. He has a few questions for a co$-$worker whom he knows is knowledgeable on the subject. As they're discussing some of the topics, he gives the co$-$worker permission to the resources so they can look at the information on their own. Which of the following access control methods does Kareem's company use?

a$.$ RBAC

b$.$ MAC

c$.$ TSAC

d$.$ DAC