To solve this question, the user needs to know about JCL (Job Control Language) and the different parameters that can be used to customize a job step.
The JOBLIB and STEPLIB parameters are used to specify the location of program libraries that contain the executable programs required for a job. The PGM parameter is used to specify the name of the program to be executed for a particular job step.
Option A - JOBLIB: The JOBLIB parameter is used to specify the location of program libraries that contain the executable programs required for the entire job. This parameter is not specific to a particular job step.
Option B - STEPLIB: The STEPLIB parameter is used to specify the location of program libraries that contain the executable programs required for a particular job step. This option is correct as it provides a way to specify the location of the program specific to a job step.
Option C - Any of the above: This option is incorrect as the JOBLIB parameter cannot be used to specify the location of the program for a specific job step.
Option D - PGM: The PGM parameter is used to specify the name of the program to be executed for a particular job step. This parameter does not specify the location of the program.
Therefore, the correct answer is:
The Answer is: B. STEPLIB