Correct answer - "'x-amz-server-side-encryption': 'aws:kms'" : If the request does not include
the x-amz-server-side-encryption header, then the request is denied.
"'x-amz-server-side-encryption': 'SSE-S3'" - Invalid header value
"'x-amz-server-side-encryption': 'SSE-KMS'" - Invalid header value. SSE-KMS is an encryption
option
"x-amz-server-side-encryption': 'AES256'" - Correct header value if using SSE-S3 server-side
encryption