A.
12.24.0.0/18, 12.24.64.0/18, 12.24.128.0/18, and 12.24.192.0/18
B.
12.24.0.0/18, 12.24.32.0/18, 12.24.64.0/18, and 12.24.96.0/18
C.
12.24.0.0/19, 12.24.32.0/19, 12.24.64.0/19, and 12.24.96.0/19
D.
12.24.0.0/19, 12.24.64.0/19, 12.24.128.0/19, and 12.24.192.0/19