These IBM Enterprise COBOL compiler options affect runtime: AWO (Atomic Write Optimization), FASTSRT (Fast Sort), and RENT (Reusable/Reentrant code). Since all three options impact runtime performance, 'All of the above' is correct.
Compiler options like AWO (optimize storage access), FASTSRT (allows the compiler to pass sort work to an external sort routine for speed), and RENT (reentrancy, affecting how storage is managed at runtime) all directly influence how a COBOL program performs at execution time, so all three affect runtime performance.