Which option is NOT listed as one of the three sources of MST core problems?

• A. Broken or missing environment configuration
• B. Broken or incorrect patients
• C. Environment performance issues
• D. Data integrity issues

Answer: (D)

These MST issues come from problems with the testing setup and the data used to run tests. When environment configuration is broken or missing, the system can’t start or connect properly, so tests fail or behave unpredictably. If the patients are broken or incorrect, the test inputs are invalid, leading to misleading results or impossible scenarios. Environment performance issues—like limited CPU, memory, or slow I/O—slow everything down or cause timeouts, which distorts test outcomes. Data integrity issues, while critical for the overall validity of results, belong to data quality rather than the setup or operation of the test environment itself, so they aren’t listed as one of the three MST core problem sources.