Regarding the remote technology of Huawei OceanStor all-flash storage, which of the following options are features that it can support? (Multiple choice)

Regarding the remote technology of Huawei OceanStor all-flash storage, which of the following options are features that it can support? (Multiple choice)
A . Failure switching
B . High and low communication
C . Consistency Group
D . Negative penalty balance

Answer: ABCD