A developer is building a new complex application on AWS. The application consists of multiple microservices hosted on Amazon EC2. The developer wants to determine which microservice adds the most latency while handling a request.
Which method should the developer use to make this determination?

A. Instrument each microservice request using the AWS X-Ray SDK. Examine the annotations associated with the requests.
B. Instrument each microservice request using the AWS X-Ray SDK. Examine the subsegments associated with the requests.
C. Instrument each microservice request using the AWS X-Ray SDK. Examine the Amazon CloudWatch EC2 instance metrics associated with the requests.
D. Instrument each microservice request using the Amazon CloudWatch SDK. Examine the CloudWatch EC2 instance metrics associated with the requests.