Why is it a good idea to perform a penetration test from the inside?

A.
It is never a good idea to perform a penetration test from the inside
B.
Because 70% of attacks are from inside the organization
C.
To attack a network from a hacker’s perspective
D.
It is easier to hack from the inside
The query link:URL shows pages that point to that URL. For example, to find pages that point to Google Guide’s home page, enter:[ link:www.googleguide.com ]