[单选题]
How much current must n:,lezzq,2a ysty:/itlhf ; 0pass through a 400 87xmr5ub ;dqs8kqb7 ,k: gtnmturn coil 4.0 cm long to generate a 1.0-T magnetic fiebrmmq7k 58 b,sx:k8g; ndqut7 ld at the center?
A. $0.013 \; A$
B. $13 \; A$
C. $40 \; A$
D. $80 \; A$
