In Rembrandt's Anatomy Lesson of Dr

In Rembrandt's Anatomy Lesson of Dr. Tulp, he has clustered the participants on the left side and has placed Dr. Tulp on the right side with the diagonally placed foreshortened corpse disrupting the strict horizontal, planar orientation. This is in sharp contrast to which of the following traditions of group portraiture?

A) The subjects were placed evenly across the canvas
B) Group portraits of professional organizations were never portrayed
C) Only five subjects were allowed per group portrait portrayals
D) Only guilds were allowed as subjects for group portraits