On Earth, an astronaut with a mass of 100 kg has a weight of 735 N. On the Moon, the same astronaut has a mass of 100 kg and a weight of 123 N. Which statement BEST describes this difference in weight on Earth and the Moon? 
A. The Moon has a greater mass than Earth. 
B. The Moon is larger than Earth. 
 C. Earth is larger than the Moon. 
 D. Earth has a greater mass than the Moon.