What is one of your text's unifying themes related to psychology as a field of study

A)  Heredity and environment jointly influence behaviour. 
B)  Psychology evolves in a sociohistorical context. 
C)  Behaviour is determined by multiple causes. 
D)  People's experience of the world is highly subjective.

Sociohistorical Context

The social, historical, and cultural background influencing an event, person, or movement, placing them within a broader societal framework.

Heredity

The passing of traits or characteristics from parents to offspring through genes, affecting physical appearance, health, and behavior.

Behaviour

The actions, reactions, or functioning of an organism, typically in response to its environment or stimuli.