[单选题]
What is the parallax angle fscufn)bh,g ,- or Proxima Centauri, which is Euh9q 8p dnasrhk; kcj.9mvx 3)qe:1;w arth's nearest star at 4.3 ly;ndh1hr vaejuw3qk)s.m8q 99 k:x ;cp ?
A. $1.2 \times 10^{-14} \; degrees$
B. $2.1 \times 10^{-4} \; degrees$
C. $1.2 \times 10^{-7} \; degrees$
D. $2.1 \times 10^{-7} \; degrees$
