Which One of the Following Examples Describes a Communication Mode

Which one of the following examples describes a communication mode that would be best for signaling over the greatest distance in a dark,densely forested environment?

A) display of plumage of a male bird to attract females
B) waggle dance of a honeybee in a colony within the forest
C) pheromones released by a female moth
D) territorial song of a male bird to repel other males
E) flashing of a male firefly to attract conspecific females