$5-$Which of the following statements are correct about PL$/$SQL$?$

A$.$PL$/$SQL allows to improve performance of repeatable queries.

B$.$CPL$/$SQL and Oracle SQL are fully compatible.

C$.$DPL$/$SQL is a procedural extension of Oracle SQL

D$.$PL$/$SQL can be used outside an Oracle database environment

E$.$PL$/$SQL allows to write object$-$oriented code.

Choose the correct answer: