A Solaris 10 OS server on your network has the packet filter enabled. The rule of Solaris IP Filter firewall is:

block in proto icmp all

This rule, stored in the /etc/ipf/ipf.conf file, blocks all Internet Control Message Protocol (ICMP) traffic.

Which command modifies this rule so it prevents only ping traffic?

A.
block in proto icmp from any to any

B.
block in proto icmp all icmp-type echo

C.
block in proto icmp all icmp-type dest-unreach

D.
block in proto icmp from any to any icmp-type dest-unreach