Hernandez, a clothing retail firm, maintains a database that contains all necessary work$-$related details of its employees. The information includes each employee's date of hire, job history, education, and performance and compensation history. The database allows the management to forecast the labor demands within the firm. In the given scenario, Hernandez is most likely using a $\_\_\_\_\_.$

a$.$ human resource information system

b$.$ professional employer organizer

c$.$ process control system

d$.$ transaction processing system