Introductory Sociology Classes Tend to Have Fairly Large Enrollments,perhaps More

Introductory sociology classes tend to have fairly large enrollments,perhaps more than 100 students.In contrast,graduate seminars have small enrollments,usually fewer than 15 students.How does this difference in enrollment influence the dynamics of the different classes?

A) Students in the introductory classes are less likely to skip class because they want to spend time with all of their friends.
B) It is more acceptable and less noticeable to skip a graduate seminar because graduate students have many other responsibilities.
C) If a student skips the introductory class, it will have little or no effect on the class, whereas if a student skips the seminar, it will influence the class more.
D) In the larger class, the professor makes a point to learn the students' names because attendance is more important for freshmen than graduate students.
E) Enrollments do not influence classroom dynamics; only the professor can have such an impact.