Threadless is a community-centered online apparel store that leverages user-generated content. The idea is to turn consumers into prosumers, a hybrid between producers and consumers. Members of the Threadless community do most of the work, which they consider fun: They submit T-shirt designs online, and community members vote on which designs they like best. The designs receiving the most votes are put in production, printed, and sold online. It can be said that Threadless uses the technique.

A) crowdsourcing
B) product diversification
C) horizontal integration
D) offshoring