Which statement is true regarding external tables?

Which statement is true regarding external tables?

A.
The default REJECT LIMIT for external tables is UNLIMITED.

B.
The data and metadata for an external table are stored outside the database.

C.
ORACLE_LOADER and ORACLE_DATAPUMP have exactly the same functionality
when used with an external table.

D.
The CREATE TABLE AS SELECT statement can be used to unload data into regular
table in the database from an external table.