An enterprise has two nodes： -Node ’A’ runs a large relational database and ha six CPUs and  32GB of memory. -Node ’B’ is an application server with three CPU’s and 16GB of memory. During peak production periods， the CPU load for Node ’A’ is normally between 30% and 40%. For Node ’B’， the CPU load is 10% to 20% during peak production periods.  Which of the following describes the best solution for an HACMP cluster？（）  

• A、 Two cluster with two resource groups in a mutual takeover configuration.
• B、 One cluster with two cascading resource groups in a mutual takeover configuration.
• C、 One cluster with two rotating resource groups in a one-sided hot standby configuration.
• D、 Two clusters with two resource groups in a hot-standby configuration with a newly acquired third node.