Whi.li statement is true regarding the management of tablespaces?

Whi.li statement is true regarding the management of tablespaces?

A.
AUTOEXTEND can be enabled only for new data files.

B.
Dictionary-managed tablespaces can be converted to locally managed tablespaces.

C.
Space usage alert thresholds can be modified only if the tablespace contains no data.

D.
Locally managed temporary tablespaces can be converted to permanent tablespaces.

Explanation: