A Developer Has Written a Multi-Threaded Application That Is Running

Multiple Choice

A developer has written a multi-threaded application that is running on a fleet of Amazon EC2 instances. The operations team has requested a graphical method to monitor the number of running threads over time. What is the MOST efficient way to fulfill this request?

A) Periodically send the thread count to AWS X-Ray segments, then generate a service graph on demand.
B) Create a custom Amazon CloudWatch metric and periodically perform a PutMetricData call with the current thread count.
C) Periodically log thread count data to Amazon S3. Use Amazon Kinesis to process the data into a graph.
D) Periodically write the current thread count to a table using Amazon DynamoDB and use Amazon CloudFront to create a graph.