The correct answer to this open question is the following.
Although you did not attach the research reference and the options, we can comment on the following.
In the research on teachers as effective managers, it was found that during the first days of school effective teacher has to establish the foundation of the class during for the semester, This means the teacher has to set the expectations and goals of the class, clarify the rules, the discipline and the behavior allowed in the class. The teacher has to explain the proper procedures and characteristics of the work to be done in class and homework. And the way students are going to be evaluated.