Answer:
A. Is a distributed file system
Step-by-step explanation:
The WAFL is a distributed file system. It is blocked based and it has to make use of inodes to describe it's files. This is a proprietary file system, ystem layout. The WAFL makes use of files for the storage of meta-data which gives a description of the layout of the file system.
The WAFL is named the Write Anywhere File Layout because all data can be written in any part on the disk.