What is a characteristic of a low-surface-brightness galaxy (LSB galaxy)?

A. It has a surface brightness that, when viewed from Earth, is at least one magnitude lower than the ambient night sky
B. It has a surface brightness that is comparable to the ambient night sky
C. It has a surface brightness that varies greatly depending on the time of observation
D. It has a surface brightness that is at least one magnitude higher than the ambient night sky
Answer: 