23. A species of malaria-carrying mosquito lives in a forest in which two species of monkeys, A and B, coexist. Species A is immune to malaria, but species B is not. The malaria-carrying mosquito is the chief food for a particular kind of bird in the forest. If all these birds were suddenly eliminated by hunters, which of the following would be an immediately observable consequence?
(A) emergence of malaria-resistant strains in monkey species B.
(B) emergence of malaria-sensitive strains in monkey species A.
(C) increased mortality in monkey species B.
(D) increased mortality (death rat( E ) in monkey species A.
(E) increased mortality in the malaria-carrying mosquitoes.