[单选题]
The appearance of the great range o.d4s*qb*r b( fsr25k v. wwmjaf brightness amonggmkf.))vcz 2hzgu1m 3 stars 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
