To be hired as a firefighter, Janae must accomplish three objectives in this order: she must climb 10 flights of stairs wearing a 70-pound vest, she must crawl on her hands and knees through a 50-meter tunnel, and then she must drag a 160-pound dummy 100 meters. She finishes the first task, but is unable to complete the second task. She is immediately eliminated from the process. The selection process being used in this example is MOST likely multiple: