The Interaction of Two Populations X(t)and Y(t)is Modeled by the System

Multiple Choice

The interaction of two populations x(t) and y(t) is modeled by the system $\frac{1}{x} \frac{d x}{d t}=1-x-k y, \frac{1}{y} \frac{d y}{d t}=1-y+k x$ , where k is a positive constant.What type of interaction is modeled here?

A) Symbiosis
B) Predator-Prey with y the predator and x the prey.
C) Predator-Prey with x the predator and y the prey.
D) Competition
E) None of the above