[单选题]
On a day when the speed of soqqbtw k*vl,5 9m a2,dxhn4b2gund in air is 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s later. How far hng42ad2bxm, away was the object that reflected back the sound?
A. $4.25 \; m$
B. $8.50 \; m$
C. $0.425 \; m$
D. $0.850 \; m$
