please answer with a,b,c,d only. no explanation needed. thanks

55) What is an example of direct labor? Wages for accounting staff in company headquarters Wages for component assemblers in an airplane manufacturer Wages for factory quality control Inspectors Wages for factory maintenance workers 56 In a job order costing system, which production cost is allocated rather than being directly associated with a job or product or project? Cost of concrete in making a road Cost of bricks in making a building Wages for factory supervisors in a wood furniture plant Wages for assembly-line workers in an automobile plant