What will happen upon execution?

A script abc.sql must be executed to perform a job.
A database user HR, who is defined in this database, executes this command:
$ sqlplus hr/hr@orcl @abc.sql
What will happen upon execution?
A. The command succeeds and HR will be connected to the orcl and abc.sql databases
B. The command succeeds and HR will be connected to the orcl database instance, and the abc.sql script will be executed
C. The command fails because the script must refer to the full path name
D. The command fails and reports an error because @ is used twice

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