Which of the following process areas is a TMMi level 4 process area?

Advanced Reviews is a TMMi Level 4 process area. At TMMi Level 4 (Measured), organizations focus on making testing a quantifiable process, using metrics and measurements to evaluate and improve product quality and the testing process. Advanced Reviews involve more structured and formalized review processes that are integrated with the dynamic testing approach to measure and improve product quality earlier in the lifecycle.

The Test Policy and Strategy is part of Level 2.

Defect Prevention is part of Level 5.

Test Lifecycle and Integration is part of Level 3.

TMMi References:

TMMi defines Advanced Reviews as a Level 4 process area aimed at improving product quality through more rigorous and measurable review processes​​.