When a user logs into a system using SSH, what is the format of SELinux security context which will assign the user_r role and the user_t domain to their login sessions?
A. user_r:user_t system_r:sshd_t
B. sshd_t:system_r user_t:user_r
C. system_r:sshd_t user_r:user_t
D. user_t:user_r sshd_t:system_r