Final answer:
Using AWS SDK for X-Ray, one can create a Subsegment to measure granular performance of a singular API call or specific lines of code, which helps in identifying latency and performance issues in a detailed manner. Option D is correct.
Step-by-step explanation:
When using the AWS SDK for X-Ray to measure the granular performance of a singular API call or specific line(s) of code, you can create a new Subsegment.
A Subsegment is used to record additional details about the work done by individual services or resources being tracked by an AWS X-Ray trace.
Creating and adding Subsegments to a trace allows you to drill down into the performance data of your application, thereby providing a detailed view of the latency and performance bottlenecks.
Hence, option D is correct.