[单选题]
A train is traveling toward ylubyyaq(y; .)8uv5zgpyz 92 t ou at srbr( x ywf.w5x,5+ggl) sga.120 km/h. The train blows its 400-Hz whistle. Take the speed ls)x5w gfyaw .(rg.x 5s,b+rgof sound to be 340 m/s. What frequency do you hear?
A. $444 \; Hz$
B. $439 \; Hz$
C. $364 \; Hz$
D. $361 \; Hz$