[单选题]
A star has absolute lumpx 2-dg( (ttaoinosity equal to that of the Sundr c 2(zp6bb*m ($1.5 \times 10^{8} \; km$ 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. $2 \times 10^{-15}$
