The response times on a Samba server are gradually increasing， so it is decided to experiment with various socket options in smb.conf. Which of the following are valid values for this parameter？（）

A. Samba does not support VFS.
B. Compile and load vfs.ko kernel module.
C. Compile and load vfs.ko and its dependent smbfs kernel modules.
D. Compile and load pvfs.ko kernel module.
E. Compile Samba with VFS module support.

A. Libraries
B. TDB files
C. Configuration files
D. Binaries
E. winbindd_privileged directory