单项选择题

在包含子网172.16.17.0/22的网络中,哪个主机地址是合法的

A.172.16.17.1 255.255.255.252
B.172.16.0.1 255.255.240.0
C.172.16.20.1 255.255.254.0
D.172.16.16.1 255.255.255.240
E.172.16.18.255 255.255.252.0
F.172.16.0.1 255.255.255.0