Which statement about Web $2\mathrm{.}0$ is true?

It is important to joust over the precise definition of Web $2\mathrm{.}0.$

Social media turned Wikipedia into one of the most profitable sites on the Internet.

It is significant how quickly the Web $2\mathrm{.}0$ revolution started and failed in a short span of time.

Peer production is leveraged to create much of the open source software that supports many of the Web $2\mathrm{.}0$ efforts.