A private cloud is defined as:

A.
A deployment model that uses an external cloud to provide host application services that are Internet
accessible.

B.
A deployment model that partners with other industry related companies to provide infrastructure services.

C.
A deployment model that uses virtualization technologies to provide infrastructure on demand within its
network.

D.
A deployment model that uses an external cloud provider to provide host infrastructure services that are
Internet accessible.

Explanation:
Private cloud is a type of cloud computing that delivers similar advantages to public cloud, including scalability
and self-service, but through a proprietary architecture. Unlike public clouds, which deliver services to multiple
organizations, a private cloud is dedicated to a single organization.
Private cloud expenses include virtualization, cloud software and cloud management tools.
http://searchcloudcomputing.techtarget.com/definition/private-cloud