What is the effect of this parameter settings on the use of openSSH commands on both the client and server?

Examine this extract from the /etc/ssh/sshd_config file:
passwordAuthentication no
What is the effect of this parameter settings on the use of openSSH commands on both the client
and server?

A.
Passwords are not required and no ssh-keygen is required either. Only passphrase are
required.

B.
Client users whose keys are not in the authorized_keys file on the server are unable to use
passwords to authenticate themselves to the server.

C.
The ssh daemon does not ask for a password before starting or stopping the sshd service.

D.
Client users whose keys are not in the authorized_keys file on the client are unable to use
passwords to authenticate themselves to the server.

Explanation:
If you set PasswordAuthentication to no, you will no longer be able to use a login
and password to authenticate and must use a login and public key instead (if
PubkeyAuthentication is set to yes).