Which of the following is true about rmss？（）

• A、 rmss is a part of performance toolbox and stands for Reduced Memory System Simulator
• B、 rmss is a part of perfpmr and stands for Real Memory System Simulator
• C、 rmss is part of the standard bos.perf filesets and stands for Redundant Memory System Simulator
• D、 rmss is part of  WLM and stands for Real Memory System Simulator