Which of the following commands would accomplish this?

The administrator wants to deny ICMP traffic from being forwarded. Which of the following commands would accomplish this?

A.
iptables -A FORWARD -p icmp -j DROP

B.
iptables -A FORWARD -a all -proto ICMP -j REJECT

C.
iptables -A FORWARD -p icmp -j DENY

D.
iptables -A FORWARD -p udp –dport icmp -j DROP