Correct answer - "S3 access logging is pointing to the same bucket and you are getting
exponential growth" : S3 access logging writes new files to a bucket. If the destination bucket
of these logs is the same as the source, you will experience an exponential growth of files, as
the new log files being created will themselves generate log content.
Incorrect:
"You experienced a DDOS on your S3 bucket" - Although AWS handles DDOS on managed services an
attack such as this would not add files to you bucket
"Encryption has been enabled" - Encryption does not grow your bucket
"Without bucket policies the bucket will grow in size rapidly" - Policies do not prevent bucket
sizes for no apparent reason