Issue with the solution to a question of the Fundamentals of Quantum Computing Using Qiskit v2.X Developer - Sample Test

URL to the relevant guide or resource

Sample test available at https://s3-api.us-geo.objectstorage.softlayer.net/credman-prod/exam/C1000-179_SAM_SampleTestQiskitv2.pdf?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=88673a689335411dbbef07d4969c34c2%2F20251121%2Fus-geo%2Fs3%2Faws4_request&X-Amz-Date=20251121T171735Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&response-content-disposition=inline%3B%20%3B%20filename%3D%22C1000-179_SAM_SampleTestQiskitv2.pdf%22&X-Amz-Signature=b9dedbee17fb3a7f9120ccac4a6fe9f0cd1cc9617097088f2d1668a5f75e9aaa,
accessible from https://www.ibm.com/training/certification/ibm-certified-quantum-computation-using-qiskit-v2x-developer-associate-C9008400.

Error mitigation guide: https://quantum.cloud.ibm.com/docs/en/guides/configure-error-mitigation

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• new content request
• typo
• code bug
• out-of-date content
• broken link
• other

Describe the fix or the content request.

Hi all,
I think there's an issue with a solution of the Sample Test for the Fundamentals of Quantum Computing Using Qiskit v2.X Developer exam. The incriminated question is number 16:

Which error mitigation technique can be applied using resilience options?

The sample test reports c - Zero Noise Extrapolation as the only solution. However, the Configure error mitigation guide at https://quantum.cloud.ibm.com/docs/en/guides/configure-error-mitigation states that Resilience Level 2 also accounts for gate twirling, therefore making answer a correct, too.

If I am correct, solution to question 16 should therefore be changed to a, c.

For new content requests - if the request is accepted, do you want to write the content?

I only want to review the material when it's finished

Start by reviewing question 16 in the linked C1000-179 sample-test PDF and comparing its answer key with the Configure error mitigation guide. Verify the claim about gate twirling at resilience level 2, then update the sample-test answer if confirmed; done means the answer and explanation match the current guide.