MrLahore Hired Four College Students to Paint His House

Mr.Lahore hired four college students to paint his house.Given what you know about social loafing,which set of conditions is likely to produce the best work by the group of students?

A) Each student paints one room by himself.
B) All the students work together on each room.
C) The students work in two-person teams.
D) The students should all wear the same uniform and paint the rooms together.