A SysOps Administrator is in the process of setting up a new AWS Storage Gateway. The Storage Gateway activation is failing when the Administrator attempts to activate the Storage Gateway from the Storage Gateway console.
What are the potential causes of this error? (Choose two.)

A. The Storage Gateway does not have an upload buffer configured.
B. The Storage Gateway does not have a backing Amazon S3 bucket configured.
C. The Storage Gateway does not have a cache volume configured.
D. The Storage Gateway does not have the correct time.
E. The Storage Gateway is not accessible from the Administrator’s client over port 80.