A host with an OLTP workload is configured with five standard devices on an EMC Symmetrix VMAX. In the host LVM, the storage is configured into a concatenated logical volume. The back-end storage consists of Fibre Channel disk drives. The host has two HBAs zoned to two FAs.
The workload hits a ceiling at around 66% of the peak workload requirements with high random reads. At peak times:
Disk director % utilization is low
Host port % utilization is low
Disk I/O per second is low
Current write pending count is high

What is a likely solution to this problem?

A.
Add striped metavolumes

B.
Add standard devices to the existing LVM volume

C.
Add more HBAs to the host

D.
Add more FAs to the storage devices