Which two statements about multitenant architecture are true?

Multiple PDBs on a single server need multiple database instances and multiple sets of database files.

Although consolidated into a single physical database, PDBs mimic the behavior of non-CDBs.

A PDB administrator can use Oracle Flashback or point-in-time recovery to retrieve lost data from a PDB, only by shutting down all the PDBs from the CDB.

It is easier to collect performance metrics for many databases in a CDB than individual non-CDB databases.

It takes more time to apply a patch to one CDB that holds hundreds of PDBs than to hundreds of non-CDB databases.