Star a Is Identical to Star B,except That Star a Is

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

Correct Answer:

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