In Amazon CloudWatch, You Can Publish Your Own Metrics with the Put-Metric-Data

In Amazon CloudWatch, you can publish your own metrics with the put-metric-data command. When you create a new metric using the put-metric-data command, it can take up to two minutes before you can retrieve statistics on the new metric using the get-metric-statistics command. How long does it take before the new metric appears in the list of metrics retrieved using the list- metrics command?

A) After 2 minutes
B) Up to 15 minutes
C) More than an hour
D) Within a minute