You want to create a database using the DBCA with DE$\_$BLOCK$\_$SIZE as $32$KB$.$ Which statement is true?

A$.$

A block size of $3$KB is not allowed in oracle Database $12$c$.$

B$.$

You must choose the Data Warehouse template in the DBCA.

C$.$

You must choose the Custom template in the DBCA.

D$.$

You must set the environment variable DB$\_$BLOCK$\_$SIZE to $32,768.$