Task: Instance Class Understanding (ontology: Arts_Media_Entertainment/Propp)

Which of the following classes does '"Self-playing violin."' belong to? Context: "Terminal motif D1601.18.2"

A. "Self-chopping axe."
B. "Self-playing musical instruments."
C. "Automatic cudgel."
D. "Household articles act at command."

Answer: "Self-playing musical instruments."