At a station, there are two trains A and B waiting to go side by side. After a while, the passengers in the car A see the trees outside the car moving east, and the passengers in the car B see the car A through the window. If you use the ground as a reference, which of the following are movements of the two cars seen by the above passengers? ['Train A moves west, Train B is stationary.', 'Train A moves west, Train B moves east.', 'Train B moves west, Train A does not move.', 'Trains A and B move westward at the same speed.']