A Storage Admin Wants to Encrypt All the Objects Stored

Multiple Choice

A storage admin wants to encrypt all the objects stored in S3 using server side encryption. The user does not want to use the AES 256 encryption key provided by S3. How can the user achieve this?

A) The admin should upload his secret key to the AWS console and let S3 decrypt the objects
B) The admin should use CLI or API to upload the encryption key to the S3 bucket. When making a call to the S3 API mention the encryption key URL in each request
C) S3 does not support client supplied encryption keys for server side encryption
D) The admin should send the keys and encryption algorithm with each API call