Which two statements are true regarding trace options on Junos devices?

Which two statements are true regarding trace options on Junos devices? (Choose two)

A.
You can see the contents of the log file by entering the show log command

B.
Trace options will send information to your screen automatically

C.
Trace options are limited to one protocol at a time

D.
The file name and set of flags may be specified when enabling trace options