A customer has a Power 770 running an SAP ERP workload on AIX 7. It has a single partition with 12 cores and 48GB of memory and the CPU is underutilized at 46% with 1000 users. Memory utilization is at 80%. The number of users will increase to 1700, increasing memory utilization by 37%. Which of the following supports this requirement?（）

Active Memory Server
B. Active Memory Sharing
C. Active Memory Pooling
D. Active Memory Expansio