A remote office is reporting they are unable to access any of the network resources from the main office. The security administrator realizes the error and corrects it. The administrator then tries to ping the router at the remote office and receives no reply; however, the technician is able to telnet to that router. Which of the following is the MOST likely cause of the security administrator being unable to ping the router?

A.
The remote switch is turned off.

B.
The remote router has ICMP blocked.

C.
The remote router has IPSec blocked.

D.
The main office’s router has ICMP blocked.