For analyzing the performance output of an NFS client to the storage appliance, choose from the following which are the correct methods.
1) Time the mkfile command for a write test.
2) Time the dd command for a read test.
3) Time the cp command for a read and write test.
4) Verify your results with the nfsstat -c command.

A.
3 and 4

B.
All four methods

C.
1 and 4

D.
2 and 4