Which Statement About Individual Variation in the Singing Behavior of Birds

Which statement about individual variation in the singing behavior of birds is false?

A) Some species have regional song dialects.
B) Males of the same species on neighboring territories may have slightly different songs.
C) Individual variation in song may be key to attracting mates.
D) Female zebra finches prefer the undirected song of their mates over the directed song.
E) Individual variation in song may help maintain bonds between mates.