[单选题]
A very long straight wire carries-zm9b e 6)un:nkadg8w+bk oj7 a current of 25 A. What is the b.o4/x 6i xp*v-gxfcbmagnitude of the magnetic field at a distance o6.i xbxbg/ 4o-*cpv xff 0.15 m from the wire?
A. $3.3 \times 10^{-5} \; T$
B. $6.6 \times 10^{-5} \; T$
C. $3.3 \times 10^{-6} \; T$
D. $6.6 \times 10^{-6} \; T$