Unit-level product costing assigns a. direct materials, direct labor, and overhead to departmental cost pools which are assigned to products using predetermined overhead rates based on unit-level drivers b. direct materials, direct labor, and overhead to departmental cost pools which are assigned to products using predetermined overhead rates based on non-unit-level drivers Oc. direct materials and direct labor directly to products and assigns overhead to departmental pools which are assigned to products using predetermined overhead rates based on non-unit-level drivers. d. direct materials and direct labor directly to products and assigns overhead to departmental pools which are assigned to products using predetermined overhead rates based on unit-level driverm