Which type of cost occurs when an individual pays for a piano lesson instead of going to a movie?
a) fixed cost
b) marginal cost
c) residual cost
d) opportunity cost

i dont know if its a cause i did it on usatestprep and it said it was d

manifest functions are the recognized and intended consequences of any social pattern, while latent functions are those unrecognized and unintended consequences. to analyze the manifest functions of any social institution, we have to study its contribution to the continuation of a group, community, or society.