What happens alter issuing the SHUTDOWN TRANSACTIONAL statement?

You conned using SQL Plus to the root container of a multitenant container database (CDB)

with SYSDBA privilege. The CDB has several pluggable databases (PDBs) open in the
read/write mode. There are ongoing transactions in both the CDB and PDBs. What happens
alter issuing the SHUTDOWN TRANSACTIONAL statement?

A.
The statement results in an error because there are open PDBs.

B.
The shutdown proceeds immediately. The shutdown proceeds as soon as all
transactions in the PDBs are either committed or rolled hack.

C.
The shutdown proceeds as soon as all transactions in the CDB are either committed or
rolled back.

D.
The shutdown proceeds as soon as all transactions in both the CDB and PDBs are either
committed or rolled back.