The use of scientific methods to explore people's satisfaction with the past,happiness with the present,and optimism about the future is most clearly characteristic of

A) behaviorism.
B) positive psychology.
C) cognitive neuroscience.
D) the biopsychosocial approach.

The study of people's satisfaction with the past, happiness with the present, and optimism about the future is a main focus of positive psychology. Positive psychology uses scientific methods to study human flourishing and well-being, and places a strong emphasis on positive emotions, relationships, and personal strengths. Behaviorism is a psychological approach that focuses on observable behaviors rather than internal mental states. Cognitive neuroscience is the study of brain function and how it relates to mental processes, while the biopsychosocial approach incorporates biological, psychological, and social factors in understanding human health and behavior.