After an Administrator has refreshed a sandbox, what behavior should users expect to see in the sandbox?

After an Administrator has refreshed a sandbox, what behavior should users expect to see in the sandbox?
A . All new data since the last refresh will be added to the existing information in the sandbox
B . Metadata changes since the last refresh will be added to the existing information m the sandbox
C . Users in the sandbox that do not exist in production will no longer exist in the sandbox.
D . Users in production will now be able to receive emails sent out from the sandbox.

Answer: A