In Determining When It May Be Necessary to Perform a Credentialed

In determining when it may be necessary to perform a credentialed scan against a system instead of a non-credentialed scan, which of the following requirements is MOST likely to influence this decision?

A) The scanner must be able to enumerate the host OS of devices scanned.
B) The scanner must be able to footprint the network.
C) The scanner must be able to check for open ports with listening services.
D) The scanner must be able to audit file system permissions