[单选题]
A high power line carrj1+f95.6oskxdaazq l 6u5 p qceb9;zxwha:l; ying 1000 A generates what magnetic field at the ground, 10 m ua5lw;zphe9 qb;6c:x away?
A. $4.7 \times 10^{-6} \; T$
B. $6.4 \times 10^{-6} \; T$
C. $2.0 \times 10^{-5} \; T$
D. $5.6 \times 10^{-5} \; T$
