Which of the Following Statements Is True of Crowdsourcing

Which of the following statements is true of crowdsourcing?

A) It describes how the input of many people can be leveraged to make decisions that used to be based on the input of only a few people.
B) It describes how the level of buzz created for a product can be used as a measurable parameter for determining the product's effectiveness.
C) It describes various criteria to choose a suitable method to promote a product or a service.
D) It describes the factors that lead to consumers buying a product.