In which two instances should an administrator run the Manage Indexes Rebuild tool? (Select two.)

A.
to rebuild index volumes after they have been upgraded to 64-bit

B.
to rebuild index volumes that the Change Location tool has moved

C.
to rebuild index volumes after their Indexing Level has been changed

D.
to rebuild index volumes that are accidentally set to Read-only

E.
to rebuild index volumes that the Synchronize tool has failed to fix