What can you do to recover a lost passphrase for a DSA or RSA authentication key?

A.
Run the ssh-keygen Command

B.
Run the ssh –recover command

C.
A lost passphrase cannot be recovered

D.
Decrypt the authentication key with gpg

E.
Decrypt the authentication key with ssh –decrypt

Explanation/Reference:
From the man pages (ssh-keygen):
There is no way to recover a lost passphrase. If the passphrase is lost or forgotten, a new key must be generated and copied to the corresponding public key to other machines.