In CDH4 and later, which file contains a serialized form of all the directory and files inodes in
the filesystem, giving the NameNode a persistent checkpoint of the filesystem metadata?

A.
VERSION

B.
Fsimage_N (Where N reflects all transactions up to transaction ID N)

C.
fstime

D.
Edits_N-M (Where N-M specifies transactions between transactions ID N and transaction
ID N)