单选题：Which command is to extract files from filename.tgz?

Which command is to extract files from filename.tgz? @[B](1)
A. tar -czvf filename.tgz
B. tar -xzvf filename.tgz
C. tar -tzvf filename.tgz
D. tar -dzvf filename.tgz




A.tar -czvf filename.tgz
B.tar -xzvf filename.tgz
C.tar -tzvf filename.tgz
D.tar -dzvf filename.tgz


答案：B