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

A.
The IP range used by the target network

B.
An understanding of the number of employees in the company

C.
How strong the corporate security policy is

D.
The types of operating systems and applications being used.

Explanation:
From job posting descriptions one can see which is the set of skills, technical knowledge, system experience required, hence it is possible to argue what kind of operating systems and applications the target organization is using.