[单选题]
A star has absolute luminbze1x/se w8t), g f3wq *1wgwmosity equ/ik+zug zul6m:j i rv+;qs/ i8al to that of the Sun ($1.5 \times 10^{8} \; km$ 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. $2 \times 10^{-15}$
