Which of the following is NOT the characteristics of the active-active mode of a storage controller?

[answerhappygod]

Which of the following is NOT the characteristics of the active-active mode of a storage controller?

A. The primary controller processes the I/O requests from application servers and the secondary controller is in the idle state.
B. The active-active mode achieves load balancing, full utilization of resources, and system performance improvement.
C. Two controllers process the I/O requests from application servers concurrently.
D. If a controller becomes faulty, the other takes over the work of the faulty controller without disrupting ongoing services.