Final answer:
The manifest function of education refers to the intended and visible functions of education. Among the options given, social networks are considered a latent (secondary) function of education, contributing to socialization and social placement, rather than being an intended function.
Step-by-step explanation:
The manifest function of education refers to the intended and visible functions of education. In this case, the question asks for the function that is NOT a manifest function. Among the options given, c. Social networks is the correct answer. Social networks are considered a latent (secondary) function of education, contributing to socialization and social placement, rather than being an intended function.