You enabled an audit policy by issuing the following statements: SQL> AUDIT POLICY ORA_DATABASE_PARAMETER BY SCOTT; SQL> AUDIT POLICY ORA_DATABASE_PARAMETER BY SYS, SYSTEM; For which database users and for which executions is the audit policy now active? （）

A. SYS, SYSTEM

B. SCOTT

C. Only for successful executions

D. Only for failed executions

E. oth successful and failed executions