麻烦解释一下BC

问题如下：

____________ involves user communities that enable voluntary collaboration between users of a product with generally a small amount of moderation and oversight by the community host or operator.

选项：

A.

Franchising

B.

Crowdsourcing

C.

A loyalty program

解释：

B is correct.

Generically, crowdsourcing means obtaining contributions from multiple parties. Many digital business models incorporate or utilize crowdsourcing as their defining feature, whereby the company creates a service that users build, while the company simply creates rules and moderates user contributions. Common examples include social media, product reviews, open source software, and Wikis.