[单选题]
A star has absolute luminosity equal to t )p qzk-tv:,4np-b5asa oeuy:hat of the Sun ( d;e)ms);d-l3.yaesxtg /nz d $1.5 \times 10^{8} \; km$ from the Earth) but is 10 pc away from the Earth. By what factor will it appear dimmer than the Sun?
A. $2 \times 10^{-9}$
B. $2 \times 10^{-11}$
C. $2 \times 10^{-13}$
D. $2 \times 10^{-15}$
