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 . The ratio between IOPS and the EBS volume is higher than 30
B . The maximum IOPS supported by EBS is 3000
C . The ratio between IOPS and the EBS volume is lower than 50
D . PIOPS is supported for EBS higher than 500 GB size

Answer: A

Explanation:

A provisioned IOPS EBS volume can range in size from 10 GB to 1 TB and the user can provision up to 4000 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.