Which of the Following Statements Regarding the Huawei Oceanstor V3

Which of the following statements regarding the Huawei Oceanstor V3 hierarchical storage and Smart Cache is correct?

A) A client business IO load random read that accounts for more than 60% using SATA, SAS for staging storage, use SSD to do cache, so it will effectively reduce costs and improve random performance indicators
B) If hot spot data is scattered and changing rapidly, it is recommended to use tiered storage
C) If there are many SSDs and hotspots, Smart Cache is the best choice
D) If you have a small amount of SSD data, use a tiered storage disk for more utilization