WHAT IS THE TONE OF THE PASSAGE

63. - File thứ 1: De va dap an thi thu lan 2, Anh
Tiếng Anh File thứ 1: De va dap an thi thu lan 2, Anh
63. What is the tone of the passage? A. A biased representation of the development of helicopter flight. B. A personal account of helicopter development. C. An impartial overview of the development of helicopters. D. A comparison of helicopters and fixed wing aircraft.