What happens when the key missing from the header when creating a bucket using ECS S3 API D@RE key management?

What happens when the key missing from the header when creating a bucket using ECS S3 API D@RE key management?
A . ECS does not support external key management
B . Bucket creation will fail with an error to provide a key in the header
C . Encryption will not be enabled
D . A system generated key will be used instead

Answer: D