What is the possible root cause for this?

A user is trying to create a PIOPS EBS volume with 4000 IOPS and 100 GB size. AWS does not
allow the user to create this volume. What is the possible root cause for this?

A.
PIOPS is supported for EBS higher than 500 GB size

B.
The maximum IOPS supported by EBS is 3000

C.
The ratio between IOPS and the EBS volume is higher than 30

D.
The ratio between IOPS and the EBS volume is lower than 50

Explanation:
A Provisioned IOPS (SSD) volume can range in size from 4 GiB to 16 TiB and you can provision
up to 20,000 IOPS per volume. The ratio of IOPS provisioned to the volume size requested
should be a maximum of 30; for example, a volume with 3000 IOPS must be at least 100 GB.
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSVolumeTypes.html#EBSVolumeTyp
es_piops