Which is an example of a folkway?

A. The Spectors obey the speed limit when they drive in the city because they do not want to receive a traffic ticket.
B. The Thorns named their son Jeremiah after Ms. Thorn's father because it is their tradition to name their children after family members.
C. The Antouns painted their house white because the city requires all houses to be painted white.
D. The Ryersons cut their lawn during the week because of a law that prohibits loud noises on the weekends.