Students who perform average work in school sometimes receive higher grades than they actually deserve. These students are able to convince teachers that they truly enjoy the subject matter, are stimulated by the lectures, or have a personal interest in the instructor. These students must be careful, however, because exaggerated efforts may backfire.
If the statements above are true, which of the following draws the most reliable conclusion from the paragraph?
(A) Students are dishonest when it comes to grades.
(B) Teachers may give grades to students for reasons other than classroom performance.
(C) Good students will seldom resort to trickery in achieving good grades.
(D) Teachers want to help their students to excel in the classroom.
(E) The perceptions of average students are important in achieving good grades.