TheEMPLOYEEStablehassixindexesandDMLoperationsareslow.WhichcommandbeginsmonitoringtheEMPLOYEE_IDX_FKindextodeterminewhetherithasbeenusedbyanexecutionplan？（）A.ALTER TABLE employees monitor index employee_idx_fk; B.ALTER INDEX employee_idx_fk monitoring on; C.ALTER TABLE employees monitor all indexes; D.ALTER INDEX employee_idx_fk monitoring usage;

单项选择题

The EMPLOYEES table has six indexes and DML operations are slow. Which command begins monitoring the EMPLOYEE_IDX_FK index to determine whether it has been used by an execution plan？（）

A.ALTER TABLE employees monitor index employee_idx_fk;
B.ALTER INDEX employee_idx_fk monitoring on;
C.ALTER TABLE employees monitor all indexes;
D.ALTER INDEX employee_idx_fk monitoring usage;

1Z0-032