Which Description of OceanStor V3 Storage System Tuning Process Is

Which description of OceanStor V3 storage system tuning process is incorrect?

A) Need to understand the business (applications and data, etc.) , clear the goal of tuning.
B) After tuning all the system configuration parameters related to performance bottlenecks, judge whether the tuning goal is completed.
C) Back up business systems and data before tuning.
D) Monitor and analyze performance data by business processes, identify performance bottlenecks and analyze root cause.