Mr. Sains begins a lesson in chemistry by discussing the symbols for each of the elements. Part way ...

Mr. Sains begins a lesson in chemistry by discussing the symbols for each of the elements. Part way into the lesson the teacher refers to chapters and class work the students will have in six months. At another point Mr. Sains expresses dissatisfaction with the administration's new policy regarding equipment security, which will now require more paperwork. Mr. Sains then talks about an event that took place during spring vacation. The class period ends before he finishes the lesson. What appears to be the overriding problem of Mr. Sain's lecture style?
A) The teacher does not vary the topics.
B) The teacher should not share personal information with students.
C) There is a lack of clarity in the lesson presentation.
D) The lesson includes abstract elements.