To pass values from a job stream to an executable program, the user needs to understand the various mechanisms that can be used to accomplish this.

Option A: Through the VALUE parameter.

This option is incorrect. The VALUE parameter is not used to pass values from a job stream to an executable program. It is used to specify values for symbolic parameters or variables that are defined in the job stream.

Option B: Through the PARM keyword.

This option is correct. The PARM keyword is used to pass values from a job stream to an executable program. The PARM keyword can be specified in the EXEC statement that invokes the program. The value specified in the PARM keyword is passed to the program as a command-line argument.

Option C: Through the PGM parameter.

This option is incorrect. The PGM parameter is used to specify the name of the executable program that is to be executed. It is not used to pass values from the job stream to the program.

Option D: All of the above.

This option is incorrect. Only option B is correct.

Therefore, the correct answer is:

The Answer is: B