What should be investigated further?

While analyzing performance of a VMAX3 array, the following details are observed?

High host response time Low FE response time High host CPU utilization

What should be investigated further?
A . SAN connectivity
B . Disk delays
C . I/O queuing on the host
D . I/O queuing on the frontend

Answer: C

Explanation:

Reference: https://thesanguy.com/2012/09/25/san-performance-metrics/