How can this help you in foot printing the organization?

You are gathering competitive intelligence on an organization. You notice that they have jobs
listed on a few Internet job-hunting sites. There are two jobs for network and system
administrators. How can this help you in foot printing the organization?

A.
To learn about the IP range used by the target network

B.
To identify the number of employees working for the company

C.
To test the limits of the corporate security policy enforced in the company

D.
To learn about the operating systems,services and applications used on the network