Humanism is defined as study of human well-being, values and morals.Humanist are indulged in researching about human welfare and goodness.Rational method used by humans for solving the issues and needs.
Other options are incorrect because behaviorism is based on behavior of human beings, functionalism defined about functionality and psychological processes impacting human experience is psycho-dynamic concept.Thus, the correct option is option(b).
Clearly if you are given those choices, the answer is D. One of the biggest ones is a new interest in the opposite sex. The other choices also matter but not as much. There are also body changes taking place, which are connected to D, but D is still the answer.
