Which configuration file would you edit to change default options for outbound ssh sessions?

A.
/etc/ssh/sshd_config

B.
/etc/ssh/ssh

C.
/etc/ssh/client

D.
/etc/ssh/ssh_config

E.
/etc/ssh/sshclient

Explanation:
From the man pages:
ssh_config OpenSSH SSH client configuration files
the Debian openssh-client package sets several options as standard in /etc/ssh/ssh_config.