Question

Which population is most likely to be in Hardy-Weinberg equilibrium?
A=a large population of ocean fish that lives in an unpolluted ecosystem that has abundant food
B=a large population of prairie grasses that lives in an ecosystem that is frequently burned by wild fires
C=a medium-sized population of birds that lives on a chain of islands that have different food sources
D=a medium-sized population of bacteria that lives on crop plants that are frequently sprayed with pesticides