When operating in NPS compatibility mode, which of the following are limitations for using a routine written in
NZPLSQL? (Choose two.)

A.
The routine cannot contain comments.

B.
The routine must return either an integer or a null.

C.
The routine must be cross-compatible with Oracle PL/SQL syntax rules.

D.
The routine cannot contain argument lists or variable arguments (varargs).

E.
The routine must be generated with IBM Database Conversion Workbench (DCW).

Explanation:
https://www.ibm.com/support/knowledgecenter/en/SSEPGG_11.1.0/
com.ibm.db2.luw.apdv.porting.doc/doc/r_sql_compat_nzplsql.html/