You Are the Leader of a Work Team

You are the leader of a work team. During the four-month job, any one of the members might have a very busy day and need help from the others. What is the best way to ensure that the workers will be willing to help each other out, if necessary?

A) Make sure that one person is paid more than all the others, and that person will be the designated helper.
B) Give each person a comfortable, private, isolated office in which to do their work.
C) Set up all the workers in the same area of the building, where they'll see each other regularly.
D) Promise all the workers that there will be a big party at the end of the job.