What Is the Difference Between Line Managers and Staff Managers

What is the difference between line managers and staff managers?

A) Staff managers have no authority over their subordinates,while line managers do.
B) Line managers usually have more formal education than staff managers.
C) Line managers are more important.
D) In a manufacturing firm,line managers are involved in areas like marketing and production,while staff managers work in areas like personnel,and legal.
E) Staff managers have more authority than line managers.