Which line would you remove in the GRUB’s menu to prevent an automatic installation from commencing when booting from CD or DVD, but without intentions of installing?

Which line would you remove in the GRUB’s menu to prevent an automatic installation from
commencing when booting from CD or DVD, but without intentions of installing?

A.
install=true

B.
install=now

C.
install=default

D.
install=always

E.
install=yes