Using the Figure Below and Your Knowledge of the Slime

Multiple Choice

Using the figure below and your knowledge of the slime mold Dictyostelium, what might you think is the signal to change from a feeding slug to the other stages?

A) Time-the organism passes through each stage of its life cycle on a regular schedule.
B) Predators in the environment
C) Lack of nutrients in the environment
D) Temperature changes
E) All of the above