Which LSA is flooded across area boundaries?（）

A.224.0.0.0/24
B.239.128.0.0/10
C.239.192.0.0/14
D.224.0.1.0-238.255.255.255

A. autonomous-system 64555;confederation 1111 ;
B. autonomous-system 64555; confederation 1111 members [ 64555 64777 ];
C. confederation 64555; autonomous-system 1111 members [ 64555 64777 ];
D. sub-autonomous-system 64555; confederation 1111 members [ 64555 64777 ];