What is correct?
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A REGION parameter on an EXEC statement, overrides the REGION parameter on the JOB
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A REGION parameter on an EXEC statement, limits the space available for that step, but
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A REGION parameter on an EXEC statement, is only taken into consideration if there is no
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The sum of all REGION parameters on EXEC statements, must be equal to the REGION
The REGION parameter controls memory allocation. Option A is correct because an EXEC statement's REGION parameter overrides the JOB-level REGION for that specific step only - this is standard JCL parameter precedence. Option B is incorrect because it cuts off mid-sentence and misstates the override behavior. Option C is incorrect because EXEC REGION is always applied if specified - it doesn't depend on absence of JOB REGION. Option D is incorrect because REGION parameters are not additive - each step uses either its own REGION or the JOB's REGION, not a sum. The most specific (EXEC) parameter always takes precedence.