Which of the following commands will change all CR-LF pairs in an imported text file， userlist.txt， to Linux standard LF characters and store it as newlist.txt？（）

• A、 tr ’/r/n’ " < userlist.txt > newlist.txt
• B、 tr -c ’/n/r’ " < newlist.txt > userlist.txt
• C、 tr -d /r¯ < userlist.txt > newlist.txt
• D、 tr /r¯/n¯ userlist.txt newlist.txt
• E、 tr -s ®^M’¡®^J’ userlist.txt newlist.tx