After factory-defaults have been loaded, which two syslog files will be present in the configuration?

A.
system and chassis

B.
syslog-messages and NVRAM

C.
messages and interactive-commands

D.
authorization and events

Explanation:
Factory default syslog files include messages and interactive-commands.
Example: The following factory default configuration file is for a Juniper EX3200 switch:system {
syslog {
user * {
any emergency;
}
file messages {
any notice;
authorization info;
}
file interactive-commands {
interactive-commands any;
}}
etc,
http://www.juniper.net/documentation/en_US/junos14.1/topics/reference/general/ex3200-defaultconfiguration.html