Suppose That a Species of Moss Cannot Coexist with a Superior

Suppose that a species of moss cannot coexist with a superior competitor unless there is periodic disturbance. This species is also a frequent disperser. Which conclusion is most likely?

A) The moss is engaged in character displacement.
B) In a constant environment, the moss and its competitor have zero population growth isoclines that cross.
C) The moss is a fugitive species.
D) The moss demonstrates competitive reversal.