Which of the following is not an example of cloud computing?

A$.$ A company is moving its e$-$mail service to a $3$rd party$$s enterprise web application.

B$.$ A company is going to activate hosted servers automatically to handle extra processing requirement as needed.

C$.$ A company is going to consolidate $5$ web servers on to a single physical server based at it datacenter.

D$.$ The company$$s staff will access its hosted CRM application via their web browsers.