40.Evaluate the following code: SQL>VARIABLE task_name VARCHAR2(255); SQL>VARIABLE sql_stmt VARCHAR2(4000); SQL>BEGIN :sql_stmt := 'SELECT COUNT(*) FROM customers WHERE cust_state_province =''CA'''; :task_name := 'MY_QUICKTUNE_TASK'; DBMS_ADVISOR.QUICK_TUNE(DBMS_ADVISOR.SQLACCESS_ADVISOR, :task_name, :sql_stmt); END; What is the outcome of this block of code?
A.It creates a task and workload, and executes the task.
B.It creates a task and workload but does not execute the task.
C.It produces an error because a template has not been created.
D.It produces an error because the SQL Tuning Set has not been created.
正确答案是A