Which of the following is NOT an advantage of data replication over data proxies?

Which of the following is NOT an advantage of data replication over data proxies?
A . A replicated data set reduces data access latency.
B . Areplicated data set supports bidirectional writes.
C . A replicated data set offloads processing and requests from an origin data server.
D . A replicated data set is always and immediately in sync with the origin data

Answer: D