Which of the Following Can Be Cited as an Example

Multiple Choice

Which of the following can be cited as an example for crowdsourcing?

A) When Sony first released Playstation 3,it was sold at $599 in the US market,but it has been gradually reduced to below $200.
B) Months before Microsoft rolled out the latest version of its productivity suite,Office 2010,9 million people downloaded its beta version to test the software and provide feedback.
C) Dell Computers removed most of the channel partners from its supply chain to deal directly with customers.
D) Black & Decker introduced the Snakelight as an innovative solution to the problem of trying to hold a flashlight while working.