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Which three statements inserts a row into the table?()

A. INSERT INTO employees   VALUES ( NULL, ‘John’,‘Smith’);
B. INSERT INTO employees( first_name, last_name)   VALUES(‘John’,‘Smith’);
C. INSERT INTO employees   VALUES (‘1000’,‘John’,NULL);
D. INSERT INTO employees(first_name,last_name, employee_id)   VALUES ( 1000, ‘John’,‘Smith’);
E. INSERT INTO employees (employee_id)   VALUES (1000);
F. INSERT INTO employees (employee_id, first_name, last_name)   VALUES ( 1000, ‘John’,‘’);

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