The correct answer is c. collective selection.
Herbert Blumer was an American sociologist and a theorist on collective behaviour. A very important part of his work focused on the sociological analysis of fashion. He proposed that the fashion process happens through collective selection and that this process is affected by three factors. Two important factors are modernity and the gradual development and refinement of collective preferences. Finally, collective selection is affected by the fact that fashion changes in a historically continuous manner.
