What does the following iptables rule accomplish

What does the following iptables rule accomplish:

iptables A INPUT s 208.77.188.166 d 10.142.232.1 p tcp dport 22 j ACCEPT

A.
Accepts traffic on port 22 only from the host 208.77.188.166 and 10.142.232.1

B.
Forwards all requests from the host 10.142.232.1 on port 22 the internal host 208.77.188.166

C.
Forwards all requests from the host 208.77.188.166 on port 22 the internal host 10.142.232.1

D.
Drops traffic on port 22 only from the host 208.77.188.166 and 10.142.232.1