In CDH4 and Later, Which File Contains a Serialized Form

Multiple Choice

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) fstime
B) VERSION
C) Fsimage_N (where N reflects transactions up to transaction ID N)
D) Edits_N-M (where N-M transactions between transaction ID N and transaction ID N)