On the Bahamian island of Andros, mosquitofish populations live in various, now-isolated, freshwater ponds that were once united. Currently, some predator-rich ponds have mosquitofish that can swim in short, fast bursts; other predator-poor ponds have mosquitofish that can swim continuously for a long time. When placed together in the same body of water, the two kinds of female mosquitofish exhibit exclusive breeding preferences. If one builds a canal linking a predator-rich pond to a predator-poor pond, then what type(s) of selection should subsequently be most expected among the mosquitofish in the original predator-rich pond, and what type(s) should be most expected among the mosquitofish in the formerly predator-poor pond?A. Perform a reciprocal transfer of females between predator-rich and predator-poor ponds.
B. Transfer only female mosquitofish from a predator-rich pond to a predator-poor pond.
C. Remove predators from a predator-rich pond and transfer them to a predator-poor pond.
D. Build a canal linking the two ponds that permits free movement of mosquitofish, but not of predators.