[单选题]
The appearance of the0 )/wy.gpia - izy.c1wlvwe j, great range of brightness among stars8(gyih 1- unnaogurm9;f;z0y 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
