A professor is working with five teams in his marketing research class. He decides to experiment with path-goal theory in helping these groups accomplish their off-campus studies. Group A has done a project for him before. He gets them setting challenging goals and seeks to get them to produce an even better project this time. With Group B he provides very specific guidelines, sets deadlines, and lays out the rules of the class and project. He lets Group C manage their own task. He encourages them, works on building a strong rapport with them, and tries to meet their needs related to the project. By the time he gets to Group D, he discovers they're already lost, confused, and a week behind everyone else. He sets a work schedule for them and provides step-by-step guidelines regarding the project so they won't get confused or distracted again.Refer to Table 13.4. With Group A, the professor is using:A) an instrumental style.B) a supportive style.C) a participative style.D) an achievement-oriented style.