According to___the young of any species are born with variations on a wide range of characteristics. Among the young, those who are ___, until they can reproduce will be the ones whose variations are best adapted to their environment.
A. The theory or psychoanalysis; controlled by their unconscious.
B. The process of natural selection; most likely to survive.
C. The scientific method; able to gain financial resources.
D. Theory of adolescence; congruent between their different "selves.