In the context of sending metrics to CloudWatch using Amazon Kinesis, which of the following statements best describes the metric "PutRecord.Latency"?

A. It is the time taken per PutRecord operation, measured over the specified time period.
B. It is the number of successful records in a PutRecords operation per Amazon Kinesis stream, measured over the specified time period.
C. It is the time taken per PutRecords operation to calculate the statistics of the PutRecords opera-tions.
D. It is the number of successful PutRecord operations per Amazon Kinesis stream, measured over the specified time period.