Which of these is the subnet mask for the CIDR block /22?
A 255.252.0.0
B. 255.255.255.252
C. 255.255 .252.0
D. 255.255.255.254
A 255.252.0.0
B. 255.255.255.252
C. 255.255 .252.0
D. 255.255.255.254