Which of the Following Commands Changes All CR-LF Line Breaks

Which of the following commands changes all CR-LF line breaks in the text file userlist.txt to Linux standard LF line breaks and stores the result in newlist.txt ?

A) tr -d '\r' < userlist.txt > newlist.txt
B) tr -c '\n\r' '' <newlist.txt> userlist.txt
C) tr '\r\n' '' <userlist.txt> newlist.txt
D) tr '\r' '\n' userlist.txt newlist.txt
E) tr -s '/^M/^J/' userlist.txt newlist.txt