How do you write the current candidate configuration to the permanent storage media?

How do you write the current candidate configuration to the permanent storage media?

A.
[edit]
user@router# save /var/tmp/current.conf

B.
[edit]
user@router# write /var/tmp/current.conf

C.
[edit]
user@router# commit /var/tmp/current.conf

D.
[edit]
user@router# dump /var/tmp/current.conf

Explanation: