Which statement describes the ROWID data type?

Which statement describes the ROWID data type?

A.
Binary data up to 4 gigabytes.

B.
A hexadecimal string representing the unique address of a row in its table.

C.
Binary data stored in an external file, up to 4 gigabytes.

D.
Raw binary data of variable length up to 2 gigabytes.

E.
Character data up to 4 gigabytes.