Which of the following descriptions about the function of HMaster in Hbase are correct? (Multiple Choice)

Which of the following descriptions about the function of HMaster in Hbase are correct? (Multiple Choice)
A . Region load balancing, region splitting, and region distribution after splitting
B . Be responsible for creating/modifying/deleting tables
C . Be responsible for load balancing of RegionServer
D . Region migration after Regionserver failure

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Answer: ABCD