[单选题]
What is the parallax angle for Proxima Centaurbr(,w losop9w;qj c5 0 3nqyq1i, whj4oo8m), 8ht:bm( nd :vqpuoqich is Earth's nearest star at 4.)tm o(h 8juq: vpoobdmq,n :843 ly?
A. $1.2 \times 10^{-14} \; degrees$
B. $2.1 \times 10^{-4} \; degrees$
C. $1.2 \times 10^{-7} \; degrees$
D. $2.1 \times 10^{-7} \; degrees$
