Which of the following is not the potential cause of latency on an RDS read-only instance? (Single answer)

Which of the following is not the potential cause of latency on an RDS read-only instance? (Single answer)
A . The load on this read-only instance is significant.
B . There exists significant load on the ECS that is connected to this read-only instance
C . The specification of this read-only instance is too low.
D . This read-only instance’s master instance is performing a lot of write operations.

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Answer: B