Which of the following lines are valid in the file /etc/hosts? (Choose TWO correct answers.)

A.
2001:db8::15 www.example.com www

B.
www.example.com www 203.0.13.15

C.
203.0.113.15 www.example.com www

D.
www.example.com,www 203.0.13.15,2001:db8::15

E.
2003.0.113.15,2001:db8::15 www.example.com www