Which of the Following Commands Changes All Occurrences of the Word

Multiple Choice

Which of the following commands changes all occurrences of the word "bob" in file data to "Bob" and prints the result to standard output?

A) sed'/bob/Bob' data
B) sed's/bob/Bob/g' data
C) sed's/bob/Bob/' data
D) sed'/bob/Bob/' data
E) sed's/bob,Bob/' data