Compared with Mars, Earth has many common attributes. As belonging to the solar system, they are more regular spheres, with revolutions and rotations. Since there is life on Earth, Mars is likely to have life. Which one is most likely to weaken the reliability of the above judgment? (). ['Earth is too far from Mars, and it is difficult for Mars to have life.', 'Earth and Mars have different generation times.', 'arth and Mars rotate at different speeds.', 'No liquid water is currently found on D Mars.']