You Migrated a Live On-Premise Application to Magento Commerce Cloud

You migrated a live On-Premise application to Magento Commerce Cloud Pro. The performance on Staging and Production is fine. However, the internal testing team notices overall performance degradation on the Integration environment. Why is this happening?

A) The Integration branch uses Platform-as-a-Service shared resources
B) Xdebug is always enabled on the Integration branch
C) The Staging and Production environments are consuming all available resources
D) The Integration branch services have not been optimized in the .magento/services.yaml file The Integration branch services have not been optimized in the .magento/services.yaml file