Which one of the following is an example of an estimate using a parametric model?

A. The current project is similar to the past project, so the project manager will base the current estimate on the previous project.

B. Each item in the WBS must be cost-estimated to create the project cost estimate.

C. There are 7,100 network drops, and each drop will cost $175.

D. The organization is charged a set fee for all the connections to a server.