Which of the Following Is an Example of Communication

Which of the following is an example of communication?

A) the bright red flowers of a poinsettia and the pollinators it attracts
B) two male elks standing next to one another, evaluating one another's antlers and stature
C) pheromones produced by a termite queen that attract workers in the colony
D) the waggle dance of bees to inform other members of the colony as to the location of a food source
E) All of these choices are correct.