During a Penetration Test, the Tester Performs a Preliminary Scan

During a penetration test, the tester performs a preliminary scan for any responsive hosts. Which of the following BEST explains why the tester is doing this?

A) To determine if the network routes are improperly forwarding request packets
B) To identify the total number of hosts and determine if the network can be victimized by a DoS attack
C) To identify servers for subsequent scans and further investigation
D) To identify the unresponsive hosts and determine if those could be used as zombies in a follow-up scan.