Mice in a farm biology 30

On the graph, section I, II and III show the

a) stationary phase, growth phase, and lag phase of an open population
b) lag phase, growth phase, and stationary phase of an open population
c) lag phase, growth phase, and stationary phase of a closed population
d) stationary phase, growth phase, and lag phase pf a closed population

and

this tend shown in section II of the graph might have continued for an extra period of time if
a) irrigation had increased the growth of vegetation
b) predators had been allowed to roam freely
c) traps had been set to prevent emigration and immigration of mice
d) more consumers had been added to the environment of the mice