What will happen when the following block is executed?

DECLARE v_last employees.last_name%TYPE; v_first employees.first_name%TYPE; v_salary employees.salary%TYPE; BEGIN SELECT first_name, last_name INTO v_first, v_last, v_salary FROM employees WHERE employee_id=100; END;

The block will execute successfully, and the V_SALARY variable will be set to NULL.

The block will fail because the SELECT is trying to read two columns into three PL/SQL variables.

The block will fail because the SELECT statement returns more than one row.

The block will fail because V_LAST was declared before V_FIRST.