All Excel charts have a minimum of three background elements

Which of the following statements is an example of a SELF JOIN?

A) SELECT department_id, department_name,location_id, city FROM departments NATURAL JOIN locations; B) SELECT e.employee_id, e.last_name, e.department_id, d.department_id, d.location_id FROM employees e JOIN departments d ON (e.department_id = d.department_id); C) SELECT e.employee_id, e.last_name, e.department_id, d.department_id, d.location_id FROM employees e JOIN departments d ON (e.department_id = d.department_id) AND e.manager_id = 149 ; D) SELECT worker.last_name emp, manager.last_name mgr FROM employees worker JOIN employees manager ON (worker.manager_id = manager.employee_id);

To allow a property to be overridden, you must include the virtual keyword in the property’s declaration in the _________ class.

a. constructor b. derived c. base d. virtual