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

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

Answer: C