[单选题]
The appearance of the great range of bri 3v+shwnnox)ajz.j t 6 6*i9zhghtness among seuro 2:udt1z*h8l +;ka3 m3vuzxv :xltars is due to
A. the differences in the amount of light different stars emit.
B. the differences in the distances of stars from us.
C. both of the given answers
D. none of the given answers
