Star a Is Identical to Star B, Except That Star

Star A is identical to Star B, except that Star A is twice as far from us as Star B. Therefore, _ .

A) both stars have the same luminosity, but the apparent brightness of Star B is four times that of Star A
B) both stars have the same luminosity, but the apparent brightness of Star A is four times that of Star B
C) both stars have the same luminosity, but the apparent brightness of Star B is twice that of Star A
D) both stars have the same apparent brightness, but the luminosity of Star B is four times that of Star A

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