Mistakes
P.17.
What causes center of gravity movement?
1.Fuel burn
2.Passenger Movement
3.The dropping of loads, e.g. Supplies or parachustists
*The author mentions as 3rd High speeds, but the explanation concerns about a change in lift, nor merely a change on the center of gravity.
Reference: ATPL Oxford Aviation Book 6 Page 2-2, Section 2.5 Movement of CG in flight.