Which of your text's unifying themes is illustrated by the fact that many people are reluctant to try novel foods from other cultures

A)  People's experience of the world is highly subjective. 
B)  Psychology is empirical. 
C)  Behaviour is shaped by our cultural heritage. 
D)  Psychology evolves in a sociohistorical context.

Cultural Heritage

An inheritance of material items and immaterial characteristics from previous generations within a group or society.

Psychology

The scientific study of mind and behavior, including the study of consciousness, perception, emotion, motivation, brain functioning, and personality.

Sociohistorical Context

The background of social and historical influences on a person's behavior, attitudes, and opportunities.