You’ve developed an AWS Lambda function but are running into a lot of performance issues. You decide to use the AWS X-Ray service to diagnose the issues. Which of the following must be done to ensure that you can use the X-Ray service with your Lambda function?

Answer options:

A.Ensure that the X-Ray daemon process is installed with the Lambda function.
B.Ensure that the Lambda function is registered with X-Ray.
C.Ensure that the IAM Role assigned to the Lambda function has access to the X-Ray service.
D.Ensure that the IAM Role assigned to the X-Ray function has access to the Lambda function.

Answer – C
The AWS Documentation mentions the following.
Setting Up AWS X-Ray with Lambda
Following, you can find detailed information on how to set up an X-Ray with Lambda.
Before You Begin
To enable tracing on your Lambda function using the Lambda CLI, you must first add tracing permissions to your function`s execution role. To do so, take the following steps.
Sign in to the AWS Management Console and open the IAM console at https://console.aws.amazon.com/iam/.
Find the execution role for your Lambda function.
Attach the following managed policy: AWSXrayWriteOnlyAccess
Option A is incorrect since this is used if you need to use an X-Ray with an application that is hosted on an EC2 Instance.
Option B is incorrect since this is not required to begin using the X-Ray service with AWS Lambda.
Option D is incorrect since the permissions need to be assigned the other way around.
For more information on enabling X-Ray with AWS Lambda, please refer to the below URL-
https://docs.aws.amazon.com/lambda/latest/dg/enabling-x-ray.html