According to Dell EMC best practices, how should off-site data is asynchronously replicated for a DR solution?

According to Dell EMC best practices, how should off-site data is asynchronously replicated for a DR solution?
A . Include a Flash tier in a hybrid pool where asynchronous replication will be active on both the source and destination
B . Configure the sync replication ports on the CNA for 16Gb Fibre Channel on both the source and destination
C . Configure the RLP on both the source and destination arrays equal to 20% of the data to be replicated
D . Include a Flash tier in a hybrid pool where asynchronous replication will be active on the source only

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Answer: D