Which of the following can be included on the back of a personalized vest besides the R?

The Dog Division logo is an appropriate inclusion on the back of a personalized vest because it signifies the affiliation of the vest owner with a specific group or division within the Ruff Ryders community. The logo acts as a recognizable symbol that denotes membership and pride within that division, fostering a sense of belonging among the members.

The use of division logos is commonly accepted in motorcycle and riding clubs as a way to represent camaraderie, identity, and unity among members. Therefore, having the Dog Division logo on the vest not only meets the community's tradition of showcasing allegiance but also reinforces the wearer's connection to the Ruff Ryders brand and family.