Final answer:
The government is the social institution that has comparatively the least impact on culture. The correct option is C).
Step-by-step explanation:
The social institution that has comparatively the least impact on culture is The government. While each of the listed social institutions - the media, school, government, family, and religion - play a role in shaping and transmitting culture, the government typically has less direct influence over cultural practices and beliefs. The government's primary role is to enact laws and regulations that govern the functioning of society, rather than directly shaping cultural norms and values.