A user has not enabled versioning on an S3 bucket. What will be the version ID of the object inside that bucket?

A.
0

B.
There will be no version attached

C.
Null

D.
Blank

Explanation:
S3 objects stored in the bucket before the user has set the versioning state have a version ID of null. When the user
enables versioning, the objects in the bucket do not change and their ID remains null.
http://docs.aws.amazon.com/AmazonS3/latest/dev/AddingObjectstoVersionSuspendedBuckets.html