When you put objects in Amazon S3, what is the indication that an object was successfully stored?
A.
 A HTTP 200 result code and MD5 checksum, taken together, indicate that the operation was successful.
B.
 Amazon S3 is engineered for 99.999999999% durability. Therefore there is no need to confirm that data 
was inserted.
C.
 A success code is inserted into the S3 object metadata.
D.
 Each S3 account has a special bucket named _s3_logs. Success codes are written to this bucket with a 
timestamp and checksum.