Creston Vineyards, a California wine maker, is preparing to enter the Chicago market for the first time. Chicago is a complex wine market that Creston does not know well. So$,$ Creston hires a local intermediary called Wine Line that specializes in selling $($a transactional function$).$ That is$,$ Wine Line specializes in facilitating sales between Chicago wine retailers and wine makers from all over the world. It does not take title, but instead negotiates with specialty wine shops and other stores that sell wine on behalf of wine makers like Creston. Wine Line is most likely a$($n$)\_\_\_\_\_.$