Which of the Following Is an Example of Crowdsourcing

Multiple Choice

Which of the following is an example of crowdsourcing?

A) An advertising agency contracts a group of bloggers to write and publish articles about their client's products.
B) Electrogadgets.com, a site that provides information on a range of electronic gadgets, encourages members to publish their reviews and user guides.
C) A publisher pays famous writers to provide short reviews of each other's newly published books for his e-magazine.
D) An online financial services organization hires finance students as freelance workers to do routine tasks and write reports.